ExternalMandateReason — Mandate processing reason (ISO 20022)
ExternalMandateReason1Code explains a mandate decision: why a direct debit mandate request is refused, amended or cancelled — wrong account (AC01), closed account (AC04), debtor’s name mismatch, agreement ended.
ExternalMandateReason (Mandate processing reason (ISO 20022))
ExternalMandateReason1Code explains a mandate decision: why a direct debit mandate request is refused, amended or cancelled — wrong account (AC01), closed account (AC04), debtor’s name mismatch, agreement ended.
ISO 20022 48 codes ISO 20022 Registration Authority
Overview
ExternalMandateReason1Code explains a mandate decision: why a direct debit mandate request is refused, amended or cancelled — wrong account (AC01), closed account (AC04), debtor’s name mismatch, agreement ended.
When it is used
These codes belong to the mandate lifecycle, not to a collection: they answer “why can this mandate not be set up or kept?”, whereas a return reason answers “why did this collection come back?”. Several codes appear in both lists with the same wording and a different subject.
Official source: ISO 20022 External Code Sets — publication 1Q2026 Last verified: License: CC-BY-4.0
Download JSONMandate reason codes (48)
| Code | Meaning |
|---|---|
| AC01 | Format of the account number specified is not correct |
| AC04 | Account number specified has been closed on the Receiver's books |
| AC06 | Account specified is blocked, prohibiting posting of transactions against it |
| AG01 | Transaction forbidden on this type of account (formerly NoAgreement) |
| AG02 | Bank Operation code specified in the message is not valid for receiver |
| AM02 | Specific transaction/message amount is greater than allowed maximum |
| AM03 | Specified message amount is a non processable currency outside of existing agreement |
| AM05 | Duplication |
| BE01 | Identification of end customer is not consistent with associated account number(formerly CreditorConsistency). |
| BE04 | Specification of creditor's address, which is required for payment, is missing/not correct (formerly IncorrectCreditorAddress) |
| BE05 | Party who initiated the message is not recognised by the end customer |
| BE06 | End customer specified is not known at associated Sort/National Bank Code or does no longer exist in the books |
| BE07 | Specification of debtor's address, which is required for payment, is missing/not correct |
| DT01 | Invalid date (eg, wrong settlement date) |
| FF01 | File format incomplete or invalid |
| MD01 | No Mandate |
| MD02 | Mandate related information data required by the scheme is missing |
| MD07 | End customer is deceased |
| MD08 | Receiving agent does not offer specified Mandate services |
| MD09 | Account is not open to specified Mandates services |
| MD10 | Account is not open to specified Mandates services for this particular creditor |
| MD11 | Agent to whom the message needs to be forwarded cannot be located |
| MD12 | Mandate identification is not unique to the creditor |
| MD13 | There is a problem with the customer authentication |
| MD14 | Agent in the payment workflow is incorrect |
| MD15 | Currency of the transaction is incorrect |
| MD16 | Cancellation/amendment requested by the debtor |
| MD17 | Cancellation/amendment requested by the creditor |
| MD18 | Cancellation/amendment requested by the creditor and the debtor |
| MD19 | Mandate cancellation following early reimbursement of the debit by the debtor |
| MD20 | Mandate cancellation following validity expiration |
| MD21 | Mandate cancellation due to suspected fraud |
| MD22 | Mandate cancellation following mandate initiation cancellation |
| MD23 | Mandate cancellation following mandate amendment cancellation |
| MS02 | Reason has not been specified by end customer |
| MS03 | Reason has not been specified by agent |
| NARR | Reason is provided as narrative information in the additional reason information |
| RC01 | Bank Identifier code specified in the message has an incorrect format (formerly IncorrectFormatForRoutingCode) |
| RF01 | Transaction reference is not unique within the message |
| RR01 | Specification of the debtor’s account or unique identification needed for reasons of regulatory requirements is insufficient or missing |
| RR02 | Specification of the debtor’s name and/or address needed for regulatory requirements is insufficient or missing |
| RR03 | Specification of the creditor’s name and/or address needed for regulatory requirements is insufficient or missing |
| RR04 | Regulatory Reason |
| SL01 | Due to specific service offered by the Debtor Agent |
| SL11 | Whitelisting service offered by the Debtor Agent; Debtor has not included the Creditor on its “Whitelist” (yet)In the Whitelist the Debtor may list all allowed Creditors to debit Debtor bank account. |
| SL12 | Blacklisting service offered by the Debtor Agent; Debtor included the Creditor on his “Blacklist”In the Blacklist the Debtor may list all Creditors not allowed to debit Debtor bank account. |
| SL13 | Due to Maximum allowed Direct Debit Transactions per period service offered by the Debtor Agent |
| SL14 | Due to Maximum allowed Direct Debit Transaction amount service offered by the Debtor Agent |