
Processors Requiring Additional Transaction Parameters
First Data Merchant Services Nashville, Additional Credit Card Parameters
A
110 31 July 2012 Gateway Developer Guide and Reference
First Data Merchant Services Nashville, Additional Credit Card
Parameters
In addition to the core credit card parameters, First Data Merchant Services (FDMS) Nashville
accepts the parameters described below.
First Data Merchant Services North, Additional Credit Card
Parameters
In addition to the core credit card parameters, First Data Merchant Services (FDMS) North
accepts the parameters described
Field Description
INVNUM (Optional) Merchant invoice number. The merchant invoice number is used for
authorizations and settlements and, depending on your merchant bank, will appear on
your customer's credit card statement and your bank reconciliation report. If you do
not provide an invoice number, the transaction ID (PNREF) will be submitted.
Character length and limitations: 9 alphanumeric characters
Field Description
DESC (Optional) Use the DESC* parameters to pass in your DBA name and other data
describing the transaction. This information will be displayed in the account holder’s
statement.
NOTE: Note: FDMS North passes the descriptive data to the card associations with
the following character lengths:
Visa: 25
MasterCard: 22
AMEX: 20
DISC: 22
Some card associations truncate the value to 19 characters. If you have questions,
consult the card association.
Character length and limitations: 25 alphanumeric characters
MERCHDESCR (Optional) Use this parameter to pass in your DBA name and other data describing
the transaction. This information is usually displayed in the account holder’s
statement.
Character length and limitations: 25 alphanumeric characters
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