"Open" customer invoice

I sell on Ebay and created customer Ebay Sells with one invoice every month. I tag my Paypal payments to customer but I think it would be easier tag it straight to the invoice (with future date like 31). It is possible to do something similar in Quickfile.

… or it would be nice:

At the moment the credit allocation works on a FIFO basis (First in, First Out). So we don’t have the ability right now to nominate prepayments that should be assigned to a specific invoice. Any prepayment allocation is initiated from the invoice preview screen by logging a payment and selecting the credit option.

However if this is something that proves to be a popular request we can take another look. For now I’ve moved this post to a “feature request”.