Then there are the ones that pay your service fee- but not the copy costs!!
Creating an accounting nightmare as their records show they paid for job # 234999 - (even though it was short!).  I have one client who does this on every single check!!!  They do pay, -  but I have to call after checking my records to make sure it's not my mistake.  I'm spending more time entering and researching their payment checks than doing their research!!
I don't understand - I send an invoice WITH EACH RETURNED ORDER!  It makes me wonder if they are doing it on purpose!!
(I really don't believe that is so - but paranoia is setting in!)