One-Behind Transaction Confirmation

This article is part of the Payment Processing Software Library Categories
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CreditLine Payment Processing Software Processor Setup - One-Behind Transaction Confirmation. This site can also be reached at http://docs.911software.com

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Most host based processors use one-behind transaction confirmation, meaning that one transaction is valid as long as the next transaction sends the previous sequence number to confirm it. Otherwise it is voided.

For example:

Send transaction 001 

Approved.

Send transaction 002 

In the message, there is a previous sequence number field. If it matches the previous transaction, then the previous transaction stays as approved. If it does not match, the previous transaction is voided.

CreditLine stores the sequence number in 911_CCV.INI file, to make sure that each time it is correct.

Support Dependency

This create a support dependency in the 911_CCV.INI file.

1. When debugging this account, support needs to grab 911_CCV.INI, as well as other config files.
2. Support can not run transactions while the site is also running transactions.

This is typical of host-capture systems.