Field 5104 (Tip Prompting)
Simplify can be configured to automatically prompt for a Tip amount. The configured Tip setting can be overridden for a transaction by including Field 5104 in the Financial Request. If sent in the request, this field will be echoed in the response.
The format of this field is aa;bb;ccFSd where:
aa, bb and cc are reserved for future use.
d is the Tip prompting flag (0=No, 1=Yes).
The semi-colons (;) and FS (1 byte field separator) are required even if aa, bb and cc are not present. E.g.: