[IAP] How to handle missing receipt after a payment

Hi guys, I have an app that provides consumable product (in-app currency).

I wonder if there are any cases when the app does not receive the signed receipt after a payment (to send back to my server in order to verify that receipt with the App Store).

If yes, how can I handle that case? Is it possilble for the app to request the missing receipt?

Thanks in advance.