I agree with Bright. Weekly receipts is a lot of extra work and will get old real fast. Most parents will likely loose them as well.

When providing a receipt, I put the parents name, the amount they paid, the date of receipt, my name and the dates care was provided with the child's name. I just bought a cheap receipt book from dollarama and it does the trick.

This is just a suggestion but this is how I do it....every 2 weeks payment is owed. I keep a sheet for each child/parent. I mark down the date of payment, the amount of payment, the method of payment (cash or cheque) and than both the parent and I initial it. Than at the year end (or when they leave my care) I write up an official receipt for them like I mentioned above. This also helps with them just up and leaving....I require a month's notice of withdrawal and if they want their year end than they would need to give me this. (not that I think you can legally withhold a receipt but hey, whatever works! lol)