A more thorough explanation:

fieri feci

Fieri feci is a Latin term that means "I have caused to be made." In history, it was used as a sheriff's return on a fieri facias, which is a legal document that allows a creditor to collect money owed by a debtor. When the sheriff has collected some or all of the money owed, they would use the term fieri feci to indicate that the debt has been satisfied.

Example 1: The sheriff's return on the fieri facias read "fieri feci." This meant that the debtor had paid the full amount owed, and the debt had been satisfied.

Example 2: The creditor received a notice from the sheriff that read "fieri feci" and knew that the debtor had paid part of the debt, but not the full amount.

These examples illustrate how the term fieri feci was used in legal documents to indicate that a debt had been satisfied, either in full or in part.