I had a parent audited previously before, and they gave me the copy of the CRA letter requesting specific dates that the child had been in care(I had to go back through 2 years of attendance files, and this child was no longer in my care) What a pain in the ***! This parent was being scrutinized over child tax benefits or something of that nature. Ask to see the letter. I don't doubt that it's true. Then the CRA phoned me personally to verify that it was actually me who sent the letter(making sure the parent hadn't fabricated it themselves) They were very thorough!