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)Source details

Code setExternalAuthenticationMethod1Code

All 68 codes

Registered codes in ExternalAuthenticationMethod1Code. Select a code for its full definition and source details.
CodePublished name and definition
ACSNAcceptor Certificate Serial Number
Definition

Serial Number of the acceptor's certificate.

ADDBBilling Address
Definition

Cardholder billing address.

ADDSShipping Address
Definition

Shipping address.

APKIAccount Digital Signature
Definition

Account-based digital signature authentication.

ARNBAlien Registration Number
Definition

Number assigned by a government agency to identify foreign nationals.

ARPCARPC
Definition

Response Card Cryptogram (ARPC) verification.

ARQCARQC
Definition

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

ATCCATC
Definition

Application Transaction Counter.

AUVAAuthentication Value
Definition

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

BIOMBiometry
Definition

Biometric authentication of the cardholder.

BTHDBirth Date
Definition

Date of birth of a person.

CDCMCDCVM
Definition

Consumer Device Cardholder Verification Method.

CDHICardholder Identification Data
Definition

Cardholder data provided for verification.

CHDNCardholder Name
Definition

Name of cardholder.

CHSACardholder Address
Definition

Cardholder address.

CHSNCardholder Certificate Serial Number
Definition

Serial Number of the cardholder's certificate.

CPNYCompany Registration Number
Definition

Registration number of a company.

CPSGSignature Capture
Definition

Electronic signature capture (handwritten signature).

CSCVCSC Verification
Definition

Verification of Card Security Code.

CSECSecure Electronic Commerce
Definition

Authentication performed during a secure electronic commerce transaction.

CUIDCustomer Identification
Definition

Customer number used as a mechanism of authentication.

DRIDDriver License Number
Definition

Number assigned by a driving license authority to a person.

DRVIDriver Identification
Definition

Identification of a driver in a fleet of vehicles.

EMALEmail
Definition

Electronic mail address.

EMINEmployee Identification Number
Definition

Number assigned to an employee by an employer.

EMRNEmployer Identification Number
Definition

Number assigned to an employer by a registration authority.

FBIGOff Line Biographics
Definition

Biographics authentication in an offline mode.

FBIOOff Line Biometrics
Definition

Biometrics authentication in an offline mode.

FCPNOff Line PIN In Clear
Definition

PIN generated offline and transmitted in clear

FPINOffline PIN
Definition

Off-line PIN authentication (Personal Identification Number).

IDCNIdentity Card Number
Definition

Number assigned by a national authority to an identity card.

LAWELaw Enforcement Identification
Definition

Identification of law enforcement.

MANUManual Verification
Definition

Manual verification, for example passport or drivers license.

MILIMilitary Identification
Definition

Identification of military.

MOBLPhone Mobile
Definition

Customer mobile phone number.

NBIGOn Line Biographics
Definition

Biographics authentication in an online mode.

NPINOn Line PIN
Definition

On-line PIN authentication (Personal Identification Number).

NTIDNational Identifer
Definition

National Identifier.

NVSCNon Visible CSC
Definition

Non visible Card Security Code.

OCHIOther Cardholder Identification
Definition

Other cardholder data provided for identification.

OFPEOff Line PIN Encrypted
Definition

PIN generated offline and transmitted encrypted.

OLDAOff Line Data Authentication
Definition

Authentication of data in an offline mode.

OLDSOff Line Digitised Signature Analysis
Definition

Analysis of signature transmitted offline.

OTHNOther National
Definition

Other type of verification defined at national level.

OTHPOther Private
Definition

Other type of verification defined at private level.

OTPWOne Time Password
Definition

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

PASSPassport Number
Definition

Number assigned by a passport authority to a passport.

PCDVPostal Code
Definition

Verification based on digits of the postal code.

PHNBPhone Number
Definition

Generical phone number.

PHOMPhone Home
Definition

Customer home phone number.

PKISPKI Signature
Definition

PKI (Public Key Infrastructure) based digital signature.

PLOBPlace Of Birth
Definition

Place of birth of a person.

PPSGPaper Signature
Definition

Handwritten paper signature.

PRXYProxy
Definition

Proxy.

PSCDPasscode
Definition

Authentication by a passcode.

PSVEPassive Authentication
Definition

Authentication based on statistical cardholder behaviour.

PSWDPassword
Definition

Authentication by a password.

PWORPhone Business
Definition

Customer business phone number.

QWACQualified Certificate
Definition

Qualified Certificate.

SCNLSecured Channel
Definition

Channel-encrypted transaction.

SCRTSecure Certificate
Definition

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

SHAFShipping Address From
Definition

Shipping address from verification.

SHATShipping Address To
Definition

Shipping address to verification

SSYNSocial Security Number
Definition

Number assigned by a social security agency.

TAVVToken Authentication Value
Definition

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

THDSThree DS
Definition

Authentication performed during a secure electronic commerce transaction.

TRVLTravel Identification
Definition

Identification used for travel.

TXIDTax Identification Number
Definition

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.