i give an official receipt only for income tax purposes by february so that the parents have the rest of the month to double check them before the actual due date to make sure for accuracy. i will give a receipt from like those copy books for deposits that is not used at tax time by the parents (as it is included in the official tax receipt). i always give a photocopy of the parents signed contract back to them. i do not enforce immunization as it is a parents right not to immunize and can not be enforced for school systems here in ontario. i have had children who are allergic to the contents of what is in certain vaccines as well...