underpaid a credit card bill by $.27 once - they always sent a bill even if you had a zero balance. I just tore them up as I had paid it. I opened one a couple of months later for some reason or another and found that I had been hit with 3 late payments of $29 each and interest charges bill was up over $100 for a $.27 mistake
So I called them and after some discussion they agreed to drop the late charges and interest but they insisted that I pay the $.27 - I said it would cost them more to process the check than it would be worth. They insisted
Already annoyed I sat down and wrote 27 1 cent checks. Put them in an envelope and mailed them off.
Probably cost them at least 5 dollars per check to process