Technician Information

The offline processing logic is outlined below. For this description assume that the pre-auth amount "PAA" is $20 and the max offline charge "MOC" is $30.

The first time that a credit card is swiped while the satellite is offline, the satellite internally authorizes the card for the maximum offline amount (e.g. $30).
The credit card can be used in any number of transactions as long as the total amount spent while offline does not exceed the maximum offline amount ($30).
When the satellite comes back online it uploads each offline transaction up to the server:
1. If the credit card amount on the transaction is less than the total of all existing open authorizations, the amount is debited from those open authorizations.
2. If the credit card amount exceeds the open authorization, the server requests a new authorization for the maximum of the additional amount required to cover transaction and the normal Pre-Authorization amount.
  1. For example, assume that there is an open authorization with $5 remaining and the offline transaction was for $8.
    1. In this case a new authorization would be opened for MAX($8-$5=$3, PAA $20).
    2. $5 would be spent from the previous authorization, and $3 would be spent on the new authorization.
Once all offline transactions have been uploaded the satellite switches back into online mode, and all online credit card processing resumes as usual.

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