9F19

Token Requestor ID identifies which specific entity - a particular wallet provider, a specific merchant's token service, a card-on-file processor - requested the payment token being used in this transaction, distinct from identifying the underlying account itself, which is exactly what the related Payment Account Reference (9F24, covered earlier) does instead. The distinction matters operationally: 9F24 answers which account is this really, while 9F19 answers who asked for this particular token, which is precisely the pair of facts a token-based fraud or risk analysis needs to separate a legitimate token issued to a trusted wallet from an illegitimate one requested by an unauthorized or compromised requestor, even when both tokens ultimately map to the same PAR. A terminal or analysis tool that only reads 9F24 without also checking 9F19 can correctly identify the account involved in a pattern of suspicious transactions but miss which specific tokenization channel is actually the source of the problem. See EMV 4.4 Book 3.