So I recieved a return for a product a few days ago, ran the return on my POS, using the keys labeled on the machine, hit 4 for credit. went through to process the return, got an authorization number. Sent out the return invoice. Last night, I checked my bank balance and noticed it was a bit higher then it was, without any new orders... Turned out that TransTech Merchant Group sent a software update to my POS without notifying me. That update remapped the keys so that key "4" was a prior authorization sale... not refund. So the... read full review »