Sounds like I am one of the few that gives a weekly receipt after each payment - use a basic receipt book from walmart or even dollar store. And I also give an annual statement the end of January that details each month and a total and has my info on it that they need. If they are asked to provide proof of expenses to revenue canada it is that form they send in and some of mine have in the past had their taxes audited and I was so glad that my one page statement they could use made me look very professional because I was leery the whole time they were being audited knowing they were cross checking to me because of it in a sense.