payment-processingemvtlv

Cannot send a ber-tlv response with a length superior to 127


I have a problem sending IAD format 2 with biometric authentication. I work with a payment terminal and he only accept my IAD when his size is under 23 bytes (like a format 1 IAD) and I don't find where I can specify the format version.

Thank you


Solution

  • From Visa online ( you need to have access ), download Visa Contactless Payment Specification (VCPS) Visa Supplemental Requirements

    and refer section. M Issuer Application Data (IAD) and Card Verification Results (CVR) Formats

    Length of any TLV object is processed as per below rule. enter image description here