ISO 20022 · External code set

Authentication method codes

Specifies the authentication method used, as published separately in an external authentication method code set. External code sets can be downloaded from www.iso20022.org.

68 registered codesSource release: August 2026 (v3)
Registered codes in ExternalAuthenticationMethod1Code. Select a code for its full definition and source details.
CodePublished name and definition
ACSNAcceptor Certificate Serial Number

Serial Number of the acceptor's certificate.

ADDBBilling Address

Cardholder billing address.

ADDSShipping Address

Shipping address.

APKIAccount Digital Signature

Account-based digital signature authentication.

ARNBAlien Registration Number

Number assigned by a government agency to identify foreign nationals.

ARPCARPC

Response Card Cryptogram (ARPC) verification.

ARQCARQC

Verification of a cryptogram generated by a chip card, for instance an ARQC (Authorisation Request Cryptogram).

ATCCATC

Application Transaction Counter.

AUVAAuthentication Value

A value is used to verify an already performed authentication, used for non ThreeDS related authentication.

BIOMBiometry

Biometric authentication of the cardholder.

BTHDBirth Date

Date of birth of a person.

CDCMCDCVM

Consumer Device Cardholder Verification Method.

CDHICardholder Identification Data

Cardholder data provided for verification.

CHDNCardholder Name

Name of cardholder.

CHSACardholder Address

Cardholder address.

CHSNCardholder Certificate Serial Number

Serial Number of the cardholder's certificate.

CPNYCompany Registration Number

Registration number of a company.

CPSGSignature Capture

Electronic signature capture (handwritten signature).

CSCVCSC Verification

Verification of Card Security Code.

CSECSecure Electronic Commerce

Authentication performed during a secure electronic commerce transaction.

CUIDCustomer Identification

Customer number used as a mechanism of authentication.

DRIDDriver License Number

Number assigned by a driving license authority to a person.

DRVIDriver Identification

Identification of a driver in a fleet of vehicles.

EMALEmail

Electronic mail address.

EMINEmployee Identification Number

Number assigned to an employee by an employer.

EMRNEmployer Identification Number

Number assigned to an employer by a registration authority.

FBIGOff Line Biographics

Biographics authentication in an offline mode.

FBIOOff Line Biometrics

Biometrics authentication in an offline mode.

FCPNOff Line PIN In Clear

PIN generated offline and transmitted in clear

FPINOffline PIN

Off-line PIN authentication (Personal Identification Number).

IDCNIdentity Card Number

Number assigned by a national authority to an identity card.

LAWELaw Enforcement Identification

Identification of law enforcement.

MANUManual Verification

Manual verification, for example passport or drivers license.

MILIMilitary Identification

Identification of military.

MOBLPhone Mobile

Customer mobile phone number.

NBIGOn Line Biographics

Biographics authentication in an online mode.

NPINOn Line PIN

On-line PIN authentication (Personal Identification Number).

NTIDNational Identifer

National Identifier.

NVSCNon Visible CSC

Non visible Card Security Code.

OCHIOther Cardholder Identification

Other cardholder data provided for identification.

OFPEOff Line PIN Encrypted

PIN generated offline and transmitted encrypted.

OLDAOff Line Data Authentication

Authentication of data in an offline mode.

OLDSOff Line Digitised Signature Analysis

Analysis of signature transmitted offline.

OTHNOther National

Other type of verification defined at national level.

OTHPOther Private

Other type of verification defined at private level.

OTPWOne Time Password

Verification of a one-time password provided by the issuer.

PASSPassport Number

Number assigned by a passport authority to a passport.

PCDVPostal Code

Verification based on digits of the postal code.

PHNBPhone Number

Generical phone number.

PHOMPhone Home

Customer home phone number.

PKISPKI Signature

PKI (Public Key Infrastructure) based digital signature.

PLOBPlace Of Birth

Place of birth of a person.

PPSGPaper Signature

Handwritten paper signature.

PRXYProxy

Proxy.

PSCDPasscode

Authentication by a passcode.

PSVEPassive Authentication

Authentication based on statistical cardholder behaviour.

PSWDPassword

Authentication by a password.

PWORPhone Business

Customer business phone number.

QWACQualified Certificate

Qualified Certificate.

SCNLSecured Channel

Channel-encrypted transaction.

SCRTSecure Certificate

Electronic commerce transaction secured with the X.509 certificate of a customer.

SHAFShipping Address From

Shipping address from verification.

SHATShipping Address To

Shipping address to verification

SSYNSocial Security Number

Number assigned by a social security agency.

TAVVToken Authentication Value

A value used to validate the authorised use of a token.

THDSThree DS

Authentication performed during a secure electronic commerce transaction.

TRVLTravel Identification

Identification used for travel.

TXIDTax Identification Number

Number assigned by a tax authority to an entity.

Message references 52

Versions listed in the source workbook, including older versions. This list does not establish which messages a bank, network or provider supports.

  • cain.003.001.04Financial Initiation V04
  • cain.005.001.04Reversal Initiation V04
  • cain.014.001.03Retrieval Fulfilment Initiation V03
  • cain.027.001.04Charge Back Initiation V04
  • cain.027.001.03Charge Back Initiation V03
  • cafr.004.001.04Fraud Disposition Response V04
  • cain.006.001.05Reversal Response V05
  • cain.016.001.04Inquiry Verification Initiation V04
  • cafm.002.001.03File Action Response V03
  • cain.023.001.04Card Management Initiation V04
  • cain.015.001.03Retrieval Fulfilment Response V03
  • cain.002.001.05Authorisation Response V05
  • caad.008.001.02Administrative Initiation V02
  • caad.008.001.03Administrative Initiation V03
  • cain.024.001.03Card Management Response V03
  • cain.016.001.03Inquiry Initiation V03
  • cain.017.001.03Inquiry Response V03
  • cain.028.001.04Charge Back Response V04
  • cain.018.001.02Verification Initiation V02
  • caad.009.001.02Administrative Response V02
  • cafr.002.001.03Fraud Reporting Response V03
  • cain.004.001.05Financial Response V05
  • cafr.002.001.04Fraud Reporting Response V04
  • cafr.003.001.03Fraud Disposition Initiation V03
  • cain.018.001.03Verification Initiation V03
  • cafr.001.001.03Fraud Reporting Initiation V03
  • cain.017.001.04Inquiry Verification Response V04
  • cain.002.001.04Authorisation Response V04
  • cain.005.001.05Reversal Initiation V05
  • cafr.004.001.03Fraud Disposition Response V03
  • cain.021.001.04Retrieval Initiation V04
  • caad.009.001.03Administrative Response V03
  • cafm.001.001.04File Action Initiation V04
  • cafr.001.001.04Fraud Reporting Initiation V04
  • cain.014.001.04Retrieval Fulfilment Initiation V04
  • cain.019.001.03Verification Response V03
  • cain.015.001.04Retrieval Fulfilment Response V04
  • cain.024.001.04Card Management Response V04
  • cain.025.001.04Addendum Initiation V04
  • cain.021.001.03Retrieval Initiation V03
  • cain.022.001.04Retrieval Response V04
  • cain.019.001.02Verification Response V02
  • cain.003.001.05Financial Initiation V05
  • cain.001.001.05Authorisation Initiation V05
  • cafr.003.001.04Fraud Disposition Initiation V04
  • cafm.001.001.03File Action Initiation V03
  • cafm.002.001.04File Action Response V04
  • cain.022.001.03Retrieval Response V03
  • cain.023.001.03Card Management Initiation V03
  • cain.001.001.04Authorisation Initiation V04
  • cain.004.001.04Financial Response V04
  • cain.025.001.03Addendum Initiation V03

Source: UsageInMsgs sheet in 2Q2026_externalcodesets_v3.xlsx.