Hi @Sultan, The IAT number is not assigned by Visa. The "iat" (issued at) claim identifies the time at which the JWT was issued. This claim can be used to determine the age of the JWT. Its value MUST be a number containing a NumericDate value. Use of this claim is OPTIONAL. For additional information on IAT please visit this link. https://tools.ietf.org/html/rfc7519 IAT is for the occasional web token and it is for standard industry technology. It is for building a case in the web token. The IAT number, is a number that is assigned by a developer who is generating the token. The IAT number is generated by the developer creating the web token and is industry standard. Thanks.
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