Why is the account being presented before you leave?
Is this a standard thing, in the US?
Sure, I realise that credit can catch you out in resi jobs.
Over here in NZ, you are sent an invoice to be paid by the 20th of the next month, that has fallen flat on it's backside in some bad payers, but the majority of customers DO pay on time.
Don't get me wrong, anyone here that asks for money before leaving the place would be looked upon as pretty dodgy.
In reply to that original plumbers thread, most of the "Call-out" charge these days is Fuel! and time spent driving, being stuck behind trucks and other such vehicles.
You are never close to the place you are called out to 80% of the time.
People seem to think that our vehicles run on fresh-air and that we wait around with our vehicles running in the driveway waiting for them to call.
Umm, No.