Obtaining a Standard or Identifier Number

Our Role

On behalf of BSI, Pay.UK is the registration authority for the UK IIN National Numbering System and the UK’s sponsoring body for UK and overseas IINs. We are also the sponsoring body for ISO 7816-5 Registered Application Provider Identifiers (AID) and the registration authority for Standard 70 Registered Identification Numbers (TIDs).

Publicly Available Standards

Pay.UK manages the following publicly available standards:

For further information, or to obtain a copy of one of the Standards listed above, please click here

Other publicly available standards can be obtained via the following links:

Obtaining an Issuer Identification Number

Used by financial institutions and companies, Issuer Identification Numbers (IINs), identify card issuers and tell acquirers and card issuers how to route a transaction.

Obtaining a Registered Identification Number

A Registered Identification Number (RID number) is used by point of sale terminal manufacturers for the construction of terminal identification numbers (TIDs).

Pay.UK is the Registration Authority for the UK and overseas countries for the issuance of RID numbers. RID numbers are needed to implement Standard 70 (one of the standards used by the UK card payment industry) and are part of the application identifier (AID) under ISO/IEC 7816-5

What is a Terminal Identifier (RID) (10,000 TIDs) under Standard 70?

This standard is used by point of sale (POS) terminal manufacturers for the construction of terminal identification numbers (TIDs).

Each RID that is issued enables a terminal manufacturer to uniquely identify 10,000 POS terminal units. The Standard 70 RID consists of two parts:

  1. The four digit Registered Identifier (RID) – issued by the Registration Authority. The RID is kept on a register by Pay.UK.
  2. The four digit Unit Identifier (UID) – assigned by the holder of the RID to give an individual terminal a unique identifier. The UID is entered on a register kept by the holder of the RID.

How to obtain a RID (TID) under Standard 70

What is a RID under ISO/IEC 7816-5 (Application Identifier)?

The ISO 7816-5 RID is part of an AID which is structured according to ISO/IEC 7816-5 and consists of two parts:

  1. The RID – unique to an application provider and assigned according to ISO/IEC 7816-5.
  2. An optional field – assigned by the application provider known as a Proprietary Application Identifier Extension (PIX), used to identify different applications or products.

You will need this type of RID if you provide an application in an Integrated Circuit Card.

How to obtain a RID(AID) under ISO 7816-5