What does it mean to inform me by SMS whether to issue a receipt for accepting the case?

Today, another message was sent asking whether the police station had issued a receipt for accepting the case. What does that mean? A: The case has been filed. Do you want to take this receipt? So that it can be used as evidence to inquire about the case in the future!

I think: whether it's text or short message? I have never received a receipt. "~ Just reply to him: Yes! Be prepared and don't commit a crime.