If you are a Canadian registered charity and you want to issue “official donation receipts” (tax receipts) then you should look at the sample official donation receipts provided by the Charities Directorate of CRA.  They provide 4 samples depending on whether it is a cash or non-cash gift and whether there is an advantage or not.  However most charities will be mainly using the first type of receipt – cash with no advantage.

Here is the link to the sample official donation receipts
http://www.cra-arc.gc.ca/chrts-gvng/chrts/pbs/rcpts-eng.html