Where are journals coming from that have the Source as 'Creditor Allocation Batch'

Question

There are journals where the Source is Creditor Allocation Batch.  How and why are these journals created.

Answer

These journals are created when payments and credits are allocated to invoices for creditors that use Foreign Exchange and there is a gain/loss calculated because of rate differences.  

 

Where existing allocations are changed, then the original gain / loss is reversed and the new value posted.

The gain / loss for each transaction is displayed in the creditor record.