I tested the send Tax Receipt Civi function from a test donation, by checking the 'send receipt' box, then saving:
The email I received contained excess information, including a machine name, so in the interest of not disclosing that which Must Not Be Disclosed Publicly, I submit @atgo's suggestion that we either modify this so that it sends only the needed details, or suspend it.
I can upload the receipt I received if this task is made private, if that would be helpful.
Ideally, we can integrate it with our existing thank-you module.