Simple fix. Impose a late payment fee. My payday is every second Friday and it is at drop off time (not pickup). I start charging $15 per day beginning Friday at noon!

I also have a few parents who are absent minded too lol. I have one that writes me out post dated cheques for 6 months and another who leaves me a book of cheques, I fill out Friday morning and they sign when they drop off.

I have had parents who forget a cheque Friday morning but after paying 1 late fee they make sure they get their >>>> together and I get paid!