PayPal Gateway - 2012 Guide de l'utilisateur télécharger pdf (Page 131)

Gateway Developer Guide and Reference 31 July 2012 131

TeleCheck Electronic Check Processing

TeleCheck NFTF Processing Overview

System. Various optional data elements throughout each of the message packets could be

affected by this requirement.

 First Data Gateway Partners, External Gateway vendors, First Data Platforms, and the

Global Gateway Router (GGR) that route merchant transactions to TeleCheck via this

specification must code for all fields, features, and functionality available in this

specification. Nothing is optional for these partners. Additionally, these partners are

required to maintain their NFTF specification as new revisions and addendums become

available.

NFTF Processing Considerations

TeleCheck and the Merchant must determine any of the following additional optional features

during contract negotiations.

 MIA Duplicate Checking – TeleCheck has the ability to detect duplicate adjustment

transactions in back end processes. Adjustments can be submitted up to 90 days after the

original Sale transaction. While multiple adjustment transactions are allowed for a given

sale transaction, each adjustment transaction must have a unique merchant trace ID.

Duplicates are detected when an adjustment transaction is submitted that has the same

merchant trace ID as a previously submitted adjustment transaction. If a duplicate

adjustment is detected, and the original adjustment was accepted by TeleCheck, the

duplicate will also be accepted. The duplicate transaction will then be filtered out by

TeleCheck’s back end settlement processes.

NFTF Guidelines

The following guidelines should be followed when adhering to the above NFTF Requirements

to electronically process a check payment:

 Fields marked as Required are required to process an electronic transaction.

 Not all fields are required by every merchant.

 Unused fields should be completely omitted from the message.

 Each field is variable in length (justification and fillers are not used).

 The order of tagged fields from the POS and from the TeleCheck host are not significant.

 Fields must not have any hard-coded data values.

 The transaction number increments on every attempt.

Message formats outline fields (tags) that are required, not required, or conditional to the Sale,

Status, and Adjustment Inquiry packets.

Message Types:

 Merchant Authorization Message and the TeleCheck Authorization Response Message

 Merchant Delayed Capture Message and the TeleCheck Delayed Capture Response

Message

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PayPal Gateway - 2012 Guide de l'utilisateur Page 131