Client Transaction ID (ClientTrxID) Length

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Intended Audience: Software Suppliers

Situation: It has been identified that across Europe a small number of Software Suppliers have implemented short Client Transaction Id (ClientTrxId) in their software.


EMVO have issued a bulletin and we are echoing this to our UK software supplier community.
From release 1.04 of the NMVS, to be deployed in the UK on 7th August inter-market transactions will pass the ClientTrxId submitted to the EMVS for transaction correlation and this minimum field length requirement will be enforced.


Software Suppliers must ensure that when developing their software solution the Client Transaction ID (ClientTrxID) being generated must be a minimum of 8 characters.


Click to download a printable pdf copy of our Technical bulletin.