noun

• (obsolete) The fact of having received a blow, injury etc.
  "And therewith Sir Launcelot gate all his armoure as well as he myght and put hit upon hym for drede of more resseite[…]."
• (in the plural) A quantity or amount received; takings.
  "This weekend's receipts alone cover our costs to mount the production!"
• (usually in the plural) (A piece of) evidence, documentation, etc. to prove one's past actions, accomplishments, etc.
  "So, Andy, if you ask me nicely, I might produce a receipt that is my marriage certificate."
• (Internet slang, usually in the plural, by extension) (A piece of) evidence (e.g. documentation or screen captures) of past wrongdoing.
  ""Oh yes, the Internet trolls went there, and we've got the receipts"."