The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

...and entrusted with its final delivery.
I need you to acknowledge RECEIPT...
The Big Bang Theory Season 2, Episode 18

All right, here's the registration,
the window sticker, the RECEIPT.
Breaking Bad Season 4, Episode 7

(STAMMERS)
I have a RECEIPT from a blood bank.
The Big Bang Theory Season 10, Episode 10

Hey, what about this?
It looks like a RECEIPT.
The Big Bang Theory Season 7, Episode 18