CRA allows you to claim child care expenses for day camps and day sports schools where the primary goal of the camp is to care for children. So if the camps you registered your child/children fall in this category, this should be a legitimate claim.
If your child attended an overnight camp, you may not be able to claim the entire expense because of the expense caps and limits per week, but you should still be able to claim them.
I am unsure why the City would state the receipts could not be used for taxes, possibly because these camps do not meet the CRA qualifications as child care? If they do meet the requirements, a receipt made out to the person who paid the expenses, describing the camp and the child's name who attended will be accepted by CRA.
Here's a link to some more information from TurboTax: https://bit.ly/2TTqEPL
