Chargeback reason code m01. A reason code is an alphanumeric code that explains the reason behind the dispute. Chargeback reason code m01

 
 A reason code is an alphanumeric code that explains the reason behind the disputeChargeback reason code m01  This chargeback reason code is also referred to as “Point-of-Interaction” Errors

Type. Chargeback Reason Codes: List & Tips for Merchants REASON CODE CATEGORIES Fraud 10. Collect Compelling Evidence. Transaction unauthorized make up 30% of all. 4. Chargeback Reason Codes for AMEX. Cardholder Disputes. Chargeback Reason Codes List for Mastercard Chargeback Code Chargeback Reason 4801 Requested Transaction Data Not Received 4802 Requested / Required Information Illegible or Missing 4807 Warning Bulletin File 4808 Requested / Required Authorisation Not Obtained 4812 Account Number Not on File 4831 Transaction Amount Differs 4834 Duplicate. Visa - 10. 4853 – Cardholder Dispute – Digital Goods Purchase of $25 or Less. 6: Duplicate processing/Paid by other means. Merchants who receive a chargeback for a transaction placed with an American Express card may encounter reason code M01, which indicates a chargeback generated as a result of an inquiry from American Express. Reason codes. P04 – Charge Processed as Credit. Also, Ethoca Alerts only notify you of chargebacks that occur within the alert. Reason code encyclopedia Your comprehensive guide to reason codes, modifiers, time limits, and compelling evidence. 2 Compliance CasesNetwork Processing ® ©Chargebacks911 offers the most comprehensive chargeback management system available, backed by the industry's only performance-based ROI guarantee. Choose “chargeback and inquiry status” from the drop-down menu. While Apple Cash transactions are ineligible for conventional disputes, you can dispute Apple Card transactions. Managing Reason Code 57 chargebacks. American Express chargeback reason codes are divided into five categories: authorization, cardmember disputes, fraud, processing errors, and miscellaneous. 0: Changed report name from Downloadable Dispute Report to Case Report. The first two digits indicate what category the reason code falls under: 10 for Fraud, 11 for Authorization, 12 for Processing Errors, and 13 for Customer Disputes. The shorthand description is “Late Presentment. chargeback_settlement: The gross shows negative if the chargeback was resolved in the buyer's favor, and the funds return to the buyer. If they think it does, they assign it a reason code and credit the funds back to the cardholder’s account. The agency must provide this documentation to Vantiv (via mail, fax, online/scanning) within 30 calendar days after the report date on the Visa/MasterCard. P22 – Non-Matching Card Number. By entering your email, you agree to receive marketing emails from Shopify. deposit not. To win a chargeback dispute as a merchant, you must have evidence that is compelling enough to persuade the cardholder’s bank to reevaluate the case. Reason Codes A chargeback reason code is a distinctive two-to-four-character combination of letters and numbers issued by the involved bank to identify why a dispute was initiated. UA05 Fraud – Chip Counterfeit Transaction. Protect cardholder data. If you did not receive the email, open Mave, Wave’s automated chatbot, and. This may include information about the. Each chargeback reason has its own, individual prevention techniques. These symbols stand for reasons why a financial institution may file a credit card chargeback from their client’s name. Reason codes vary by card brand. For example, the dispute reason “Cardholder Does Not Recognize” is denoted under the Discover reason codes system as “AA. 6. So don’t spend another second worrying about chargebacks. A credit card chargeback is when a bank returns money to you because a credit card charge was fraudulent or you bought something online that wasn’t delivered or was. These codes can help a merchant with. For this reason, you must document all debit and credit card transactions and adhere to the strict rules set by the card networks. Updated the following columns - card type, response due date. However, it is important to note that this reason code is based on the reason given by the customer to their bank. Chargebacks. This reason code is used when the cardholder claims that their card was used fraudulently without their permission. Overall returns (all codes): 15%. Friendly fraud. Dispute. EFM MONTHLY CRITERIA NUMBER OF E-COMMERCE TRANSACTIONS FRAUD CHARGEBACK AMOUNT FRAUD CHARGEBACK RATIO BASIS POINTS (BPS) 3DS UTILIZATION (EMV 3DS + DATA. For each reason code, a definition is provided along with the merchant’s actions—or failure to act—that may have caused the chargeback,A TC40 data claim occurs when a customer makes a fraud claim against a merchant. This may be done by either the merchant or the issuing bank. It’s doable – a chargeback is not an ultimate revenue loss at face value. chargeback of credit with receipt. The following are some examples: Visa Reason Code 13. According to the 2022 Chargeback Field Report, global costs associated with chargebacks will have skyrocketed in recent years. Chargeback time limits vary widely depending on the issuing bank, and the chargeback code or reason. Chargeback reason American Express reason code Discover reason code Mastercard reason code Visa reason code; Cancelled subscription: C28: NF: 4841: 13. P05 – Incorrect Charge Amount. Though the credit card networks have a vast choice of codes, loopholes still happen. Reasons a customer may initiate a chargeback include: Ordering a product and not receiving it. Code Reason; 01: Requested Transaction Data Not Received: 02: Requested item illegible: 07: Warning Bulletin File: 08: Requested/Required Authorization Not Obtained: 12: Account Number Not on File: 31: Transaction Amount Differs: 34:Chargeback reason codes are codes used to categorize the reason for the dispute. It’s important that you include a copy of your customer terms and conditions in order to prove that the customer knew what to expect from the outset. Here are the two possible scenarios: 1. VCIPayments; NMI;. ”. Here is an overview of how the general chargeback process works with most major processors (we’ll get into how Square does it down below) Step 1: A purchase occurs. High-Risk (Excessive): Reaching a chargeback ratio of. It can range from 60 to 120 days from the billing date. This ranges anywhere from roughly 60 to 90 days after purchase. A reason code or a chargeback reason code is a string of symbols (numbers and letters). The length and structure of Reason Codes changed from a current two-digit code to four to six digits that contains decimal(s) point(s). Reason code 53 is typically used when a cardholder received merchandise or service that was defective, damaged, or not as described, while reason code 85 is used when credit was not processed to the. There are multiple situations in which this can occur. If a customer makes a chargeback request on the basis that he or she has not authorised the transaction, the customer's bank will charge the transaction back to the merchant’s bank. American Express. Chargeback reason code 10. American Express received merchant authorization to process a chargeback for the charge. When a cardholder makes a purchase, but regrets it later, they may file a chargeback to recoup their money. Mastercard Chargeback Reason Code 71: Disputed Amount. Prevention alerts arrive within 24 hours of a dispute. The following is a full list of Chargeback Reason Codes for the card schemes that Zai supports. A “No Authorization” code chargeback can also be the. 3 is part of an updated and expanded revision of the legacy codes that indicated fraud, codes which were phased out under the Visa Claims Resolution initiative. Less than 20% of merchants noted a slight decline in Visa chargebacks after VCR, while over 55% reported no decline in chargebacks. Which fraud reason codes will be included in EMV Liability Shift? How are Lost/Stolen transactions affected? A. To avoid this, issuers can identify their chip cards using the Service Code field with a first byte value of 2 or 6. Visa, Mastercard, and other leading card companies each have their own respective set of codes for this purpose. Aforementioned definitive guide includes and chargeback reason codes from each of the four major bill networks. And shorthand description is “Chargeback Authorization. By entering your email, you agree to receive marketing emails from Shopify. If the available information indicates that the customer dispute is a valid one, American Express will automatically debit your merchant account for the amount of the disputed transaction and will send you a chargeback notification for you to review. Submitted: The response has been sent and the issuer is. Automated Clearing House return codes, reasons, and details. Not recognizing your billing descriptor on a statement. ACH return codes are a type of shorthand for specific information concerning the return, much like the card decline codes or dispute reason codes used by credit card networks. . 142. Not remembering the original purchase. The chargeback transfers funds from the acquirer to the issuer. There are a number of chargeback reason codes that are dedicated specifically to transaction errors. We’ve all been there as an eCommerce owner: you excitedly ship out a $1,500 order to a customer, and then a few weeks later you’re notified that the customer has opened a chargeback dispute. Visa also overhauled its system of chargeback reason codes. VCR tables (Figures 1 and 2) map the old Reason Code to its new Reason Code. A chargeback can happen when a customer initiates a transaction dispute. Reason Code Reason Code North-America Reason Description; 4540: F29: Card Not Present (fraud). Reason Code 12. M01: Chargeback Authorization: P01: Unassigned Card Number: P03: Credit Processed as Charge: P04: Charge Processed. FR2 Fraud Full Recourse Program. Review your credit card processor’s policies to understand its chargeback dispute process. Chargeback time limits vary depending on the reason for the dispute. Versions Affected: v5, v6. 00 in chargebacks. A risk department can accurately analyze what the issue is with their merchant by seeing the individual reason code,” Cirone explained. Chargeback Reason Codes Retrieval Reason Codes 78 Int'l only Service Violation Code Discover 4541 AP 4586 AW 4755 RG 4553 RM 8002 RN2 Altered Amount Non-Receipt of Goods or Services0Cardholder Disputes Quality of Goods or Services MasterCard;45 Days from the central processing date of the transaction120 Days from the central processing date of. ” One might almost consider this chargeback a technicality, as is only existing when the merchant explicitly agreed until take responsibility since a contention and accept a chargeback. 4: . The cardholder claims they were charged multiple times for a single transaction. 3. 3 DUE DATE The Visa chargeback reason codes system underwent a major overhaul in April 2018 as part of their new Visa Claims Resolution (VCR) initiative. 2. Get your complete guide to Mastercard reason codes, including all the detailed information, chargeback time limits, and other important information you need. The process is often troublesome; most times, reason codes do not show the actual basis why customer is disputing a transaction. Only an issuer can initiate the chargeback process. Once filed, the merchant generally has 20 days to respond. Region. Visa recently shortened chargeback time limits from 45 days to 30. There are over 80 unique return codes, each representing a different return type. Chargeback reason codes are one piece of evidence you can use to make your case. Use pre-sale fraud detection service providers that can help verify the cardholder’s identity, detect potential criminal activity, and reduce the risk of accepting unauthorized transaction. 10/21/14 Updated Chargeback Time Frames: Added Reason Code 05; Addendum Reason Code PM; Changed TF time frame from 120 days to 540 days. 3. Chargeback 101: Credit Card Chargebacks Explained | Square What Is a Contactless Payment? Jan 05, 2023 — 3 min read Dec 15, 2021 — 3 min read Dec 27,. Shopify has four status categories for chargebacks and inquiries: Open: No response has been sent yet and evidence can still be added. Chargebacks911® can help your business manage all aspects of chargeback reason codes, using proprietary technologies and experience. Products. UA06 Fraud – Chip and PIN Transaction. M01: Chargeback Authorization: Processing: IN: Invalid Card. Carefully analyze the reason provided by the cardholder for the chargeback. Each chargeback has a chargeback reason code assigned to it, which is a two-digit number that corresponds to the reason the customer is disputing the charge. Once filed, the merchant generally has 20. MasterCard chargeback reason code 4540. compliance process depending on whether a chargeback right exists. It gets worse. The following are some examples: Visa Reason Code 13. 3. Card issuers and card networks deem certain chargeback codes to be nearly indisputable by merchants, and as a result, a merchant can be charged a fee of up to $500 by card networks for submitting a dispute of such chargebacks. This definitive guide comes that chargeback reason codes from jeder of of four majority card networks. This can be transaction receipts, proof of. A chargeback happens when a customer requests for a transaction to be. Chargeback Reason Codes by Network - 2023 Guide. See the list of reason codes below: Card Network. Dispute Category. Fight; Prevent;. The chargeback reverses a money transfer from the consumer's bank account, line of credit, or credit card. paper processing and mailing costs. The number of in-person fraud attacks attempted in the UK has dropped by 69% since 2004. The chargeback is ordered by the bank that issued the consumer's payment card. Visa’s process introduces four dispute categories and associated numerical labels (Fraud – 10, Authorization – 11, Processing Errors – 12, Consumer Disputes – 13) under which the renamed reason codes will be placed. Braintree Support Articles. Attempted to process transactions fraudulently. Removed these Discover Chargeback Codes: AL, CA, IC, IS, NC, SV, U03, UNR. United States. 140. Visa’s 22 chargeback reason codes will be merged into client disputes – fraud, authorization, processing errors, and four guidelines. reason_description: string. Chargeback reason code. 04/09/14 Discover: DC, U02. The shorthand description is “Chargeback Authorization. A reason code helps explain why a transaction was disputed. Spot these types of chargebacks using the below reason codes. Thanks for following the Chargeback Gurus blog. 101. For best results, your chargeback win rate should be as close to 100% as possible. many chargeback reason codes that exist today. While there are many chargeback reason codes, all chargebacks fall into one of three categories:Or fill in the chargeback form because it seems easier than contacting the merchant directly. Fraud. Now, compliance cases must be submitted through Visa Resolve Online (VROL). Respond to invalid disputes. 4860 Credit Not Processed. chargeback_settlement: The gross shows negative if the chargeback was resolved in the buyer's favor, and the funds return to the buyer. It is caused by things like beliefs, opinions, morals, regrets, fear, and confusion. Your actions in response to a Reason Code 57 chargeback will depend on the particular circumstances, the most typical of which are listed in the table below: You did process the appropriate credit to your customer’s card account. Encrypt transmission of cardholder data. Claim. Chargeback Reversal Expired: OP1: One Point Reason Code: CODE DESCRIPTION; A02: Authorization Processing Errors: A06: Unissued. . Other Fraud—Card Absent Environment. Survey data from the 2019 Chargeback Field Report found that 82% of merchants surveyed believed that the Visa Claims Resolution process had “little to no impact on chargeback management. Visa’s 22 chargeback reason codes will be merged into client disputes – fraud, authorization, processing errors, and four guidelines. Region Only) 4855 Goods or Services Not Provided. 3: Goods or services were not received: C08: RG: 4855: 13. Also, just like American Express, Discover functions as both a card network and an. See the list of reason codes below: Card Network. Chargeback Reason Codes Fraud – Card-Not-Present (CNP) Network Reason Code Bank Initiation Timeframe Accel 81 120 calendar days from transaction processing date American Express FR2, F14, F24, F29 120 calendar days from transaction processing date Discover 4752 AA, 7030 UA02 Within 30 calendar days from the close date of the TRRUpdated August 23, 2023. The issuing bank initiates the first chargeback on behalf of the cardholder by sending a chargeback notification to Adyen stating the dispute reason. For example, 10. Message. The third digit indicates the specific reason within that category. Your actions in response to such a chargeback will be determined by the particular circumstances, the most typical of which are described in the table below: If: Then: The transaction was cancelled and credit issued. It is important for the merchant to know about the American Express Chargeback. P07 – Late Submission. Shopify Payments Chargeback Reason Code #5: Product Not Delivered. There are over 80 unique return codes, and each one represents a different type of return. When a cardholder disputes a charge, their issuing bank will review the transaction and decide if. Visa Chargeback Reason Codes. unauthorized use. Here’s how your store can prevent and deal with chargebacks. P07 – Late Submission. Many subscription payment disputes are made under code 13. The process is often troublesome; most times, reason codes do not show the actual basis why customer is disputing a transaction. Discover - UA02 Fraud – Card Not Present Transaction. The list of chargeback reason codes in this article is organized by card brand and type of dispute. See full list on chargebackgurus. Updated: Valid values updated. 4854 Cardholder Dispute—Not Elsewhere Classified (U. If the cardholder is using the chargeback process incorrectly — a practice commonly referred to as “friendly” fraud — the information provided to the bank. They make it easier for originating and receiving financial institutions to spot and communicate payment failures. A reason code will be provided. This chargeback reason code can be avoided by ensuring that returns are processed promptly and accurately, and that the customer is informed of any credits issued. They only bill customers during a dispute if there is compelling evidence to show the cardholder’s account is in the wrong. • Rule changes for chargeback reason codes involving unjust enrichment associated with credits issued before or after a chargeback and/or after a second presentment. Take, for example, a reason code 4853 chargeback claiming that merchandise or services ordered were not received. Support; Login. Code Reason (for Visa) 10. Issuers must not initiate a chargeback for magnetic-stripe (POS Entry Mode value of 90 or 02) transactions on non-chip enabled cards. 10. 5 billion lost in 2020. The good news for those using Shopify Payments, the hundreds of reason codes and buckets them into eight. P01 Unassigned Card Number; P03 Credit Processed as Charge; P04 Charge Processed as Credit; P05 Incorrect Charge Amount; P07 Late. In general, most retrieval requests are issued to merchants for one of the following reasons: The cardholder wants information for his or her records. 3 may be able to represent the transaction and reverse the chargeback with the right compelling evidence. Most Common Chargeback Reason Codes #3: Order Significantly Not as Described. Oftentimes, the reason code assignment is based on limited knowledge and insight. Which is meant to know the reason for the dispute. Chargeback Reason Codes Visa. However, they don’t address the reason why that chargeback was issued in the first place. compliance process depending on whether a chargeback right exists. By understanding the reason behind the chargeback, you can gather the necessary evidence to support your case effectively. Most reason codes apply to any merchant, regardless of what’s being sold. Response to retrieval request: Based on the information provided, the acquiring and issuing banks resolve the dispute, if possible. 3 applies when a cardholder claims a charge—made in a card-present environment—was. Quickly and proactively respond to customer complaints. Scenario 1 — upfront chargeback. The reason_code will be one of the following values: chargeback_reimbursement: The gross shows positive if the chargeback was resolved in the seller's favor, and the seller gets a refund. EMV has been a mostly global standard since 2004. Most Common Chargeback Reason Codes #3: Order Significantly Not as Described. The old-fashioned way of determining the root causes of your chargebacks involves comparing. This definitive guide includes the chargeback reason codes coming each of the four greater menu networks. Amex uses the same four main categories as Visa to organize its reason codes: Authorization, Card Member Disputes (which Visa refers to as Consumer Disputes), Fraud, and Processing Errors. For example, Visa reason code 83 is one of the reason codes with several modifiers with which it’s associated. Card Issuer. Chargeback Reason Codes; BIN Lookup; ROI Tool; Company. Codes—Contains detailed information on the reason codes for the most common types of chargebacks that merchants receive . Across open networks and include account numbers sent over email, instant messaging, text, or chat. So don’t spend another second worrying about chargebacks. The standard chargeback process involves eight steps: Retrieval request: The card-issuing bank requests that the acquiring bank provide additional information for a given transaction. FAQ: What is Chargeback Representment? TIPS. There are two parts to this. A well-structured rebuttal letter should address the chargeback reason code, clearly explaining why the cardholder's dispute is not legitimate and why the funds should be returned to you. 1: EMV Liability Shift Counterfeit Fraud:. ”. ️ Provide a better customer experience. So, if a customer files an Amex chargeback, the company has good reason to side with their customer over the merchant. Card issuers and card networks deem certain chargeback codes to be nearly indisputable by merchants, and as a result, a merchant can be charged a fee of up to $500 by card networks for submitting a dispute of such chargebacks. P01 Unassigned Card Number; P03 Credit Processed as Charge; P04 Charge Processed as. Depending on the reason for the chargeback, your evidence needs to prove you: verified the identity of the shopper. g. 142. P01 Unassigned Card Number; P03 Credit Processed as Charge; P04 Charge Processed as Credit; P05 Incorrect Charge Amount; P07 Late Submission; P08 Duplicate Charge; P22 Non-Matching Card Number; P23 Currency Discrepancy; Discover chargeback codes A chargeback reason code may display a chargeback related to fraud, processing errors, consumer disputes, or a variety of other reasons. Also, remember that the time frame for your response includes any processing required by the acquirer. A02: No Valid Authorization. By entering your email, you agree to receive marketing emails from Shopify. Mastercard Chargeback Reason Code 71: Disputed Amount. American Express. It was originally just one facet of legacy reason code 81. Chargeback prevention alerts require you to monitor and respond to notifications within a short time frame, usually 24 to 72 hours. This chargeback reason code is also referred to as “Point-of-Interaction” Errors. M01 Chargeback Authorization (Chargeback) WHAT IT MEANS CATEGORYJan 2020_Chargeback Reason Code Encyclopedia - Free download as PDF File (. 1 Quick Reference Lead. Additionally, Amex uses a fifth "Miscellaneous" category. Chargeback reason codes have changed. Card Brand Code Description Days to Dispute Dispute Category;. A customer payment dispute, more commonly called a “chargeback,” happens when a cardholder disputes (challenges) a payment card transaction and asks the card-issuing bank to reverse it. Chargebacks were introduced as a form of consumer protection against. Specify the default reason code to. Reason codes are alphanumeric codes that provide the justification for granting a chargeback. Info Us; In and. If one member believed the other violated a Visa rule when handling a chargeback, they filed a pre-compliance chargeback for compensation. For each claim, you must craft your representment to suit the reason code under which the bank filed the chargeback. 16, 2021. The ECI value tells you what to do next in a 3DS transaction — proceed, reject the purchase, or try again. In the distribution industry,. To subscribe and learn more about the free online chargeback management system, or contact Chase Paymentech Client Services at 1. Scenario 2. Everyone from processors and card brands to local and federal governments has rules about how payments should be handled. 3: Goods or services were not as described: C31: RM: 13. For each reason code, a definition is provided along with the merchant’s actions—or failure to act—that may have caused the chargeback,Yank Express chargeback reason code M01 falls on the “Inquiry/Miscellaneous” category. prenotification of chargeback, depending on the chargeback reason code, to the agency requesting additional documentation to properly dispute and remedy the chargeback. Chargeback reason code 4853 can be used to indicate disputes where the cardholder simply claims that the merchant never delivered on what was promised. Visa. Visa uses chargeback reason code 75 to designate chargebacks caused by non-recognition of a credit card transaction by the cardholder. The reason_code will be one of the following values: chargeback_reimbursement: The gross shows positive if the chargeback was resolved in the seller's favor, and the seller gets a refund. Those reasons are explained through the corresponding reason codes. Chargeback Reason Codes and Descriptions. 60 due to merchandise, fees, overhead, and other sources of loss. ACH return codes and explanations for R01 – R33 returns. Duplicate Processing - 81Some Mastercard reason codes (4808, 4870, and 4871) proceed directly to arbitration if the issuer does not accept the merchant's representment. Reason Code. For example, 'R04' indicates that an invalid account number was. Nevertheless, you must respond to the chargeback based on the given code. A chargeback happens when a customer requests for a transaction to be reversed. American Express Chargebacks / Disputes. Card Member received written acknowledgement from the Merchant for a Credit, but the Credit has not been applied to the Card Member’s Account. At Visa they used to receive reason code 98. com M01 Chargeback Authorization; Processing errors. Merchants who believe they have received an invalid chargeback under reason code 13. Other Fraud—Card Present Environment. Fraudulent Activity. Chargebacks are a major threat to businesses big and small. Fight; Prevent; Recover; Technical. VCIPayments; NMI;. France saw a drop of roughly 50% during the same period. Book a demo with one of. Values are: Blank: Use the receipt G/L date. 265. Follow the Rules. The way you manage chargebacks depends on your account setup. ” One might almost please the chargeback a technicality, how this only exists when one merchant explicitly agrees to take liability for a dispute and accept a chargeback. M01. the requested documentation, your account will be debited. Below is a list of Mastercard chargeback codes used in eCommerce. 4: Fraud—Card-Absent Environment. 146. Scenario 2. Pursuant to the Fair Credit Billing Act of 1974, cardholders have the right to dispute unauthorized or erroneous charges, and issuing banks must reverse a disputed transaction if the cardholder’s claim. An issuer can initiate a first chargeback when the circumstances of the transaction meet the requirement of a chargeback reason code described in the Chargeback Guide. Through 2021, we analyzed chargeback reason codes across various subscription-based verticals. 1: Merchandise/services not received Visa uses this reason code when a customer claims they didn’t receive the goods or services they ordered from your business. Following the prompts that pop up, inform PayPal of every detail, and include the screenshots of the conversations you had with the scammer. Code 10. Under “Transaction History,” tap the transaction you want to dispute, then tap “Report an Issue. P22 – Non-Matching Card Number. non_receipt: The buyer claims they didn't get the goods or services. Moreover, there are other two categories to handle the Amex chargeback: inquiry and chargeback programs. chargeback_settlement: The gross shows negative if the chargeback was resolved in the buyer's favor, and the funds return to the buyer. If the merchant has a signature showing that the order was delivered, or evidence that the. R13 No Reply. 4. 1 = EMV-Liability Shift counterfeit. , Visa uses a two-digit code; Mastercard uses a four-digit code. Reason Code Reason Code North-America Reason Description; 4540: F29: Card Not Present (fraud). If the customer’s story matches. The major card networks have unique reason code systems, and banks use separate tools. There is a USD 25 limit for the First Chargeback (Reason Code 22). This chargeback occurs when merchants do not adequately provide currency information. Based on the information provided, Paymentology will investigate the transaction being disputed. American Express Chargebacks / Disputes. Credit card chargeback reason code: Type: Varchar; Unique: No; Blanks: Yes; Max length: 64 characters; Unique identifier which distinguishes the nature/reason of credit card chargeback reported. These are all the known American Express chargeback codes. The list of chargeback reason codes in this article. These codes are broken down into five different category. The chargeback can be for the total transaction amount or a lesser amount. 6: Credit not.