Meaning of the word "proof of purchase" in English

What does "proof of purchase" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

proof of purchase

US /pruːf əv ˈpɜːr.tʃəs/
UK /pruːf əv ˈpɜː.tʃəs/

Phrase

a document or other evidence that shows that you have bought something

Example:
You will need your proof of purchase to return the item.
Keep your receipt as proof of purchase.