show a proof

You will need to show proof of payment in order to enter our office.

It usually shows proof that something has been paid for.

Groups that made claims had to show proof of their traditional (historical) association with the land.

"First we have to show proof to the world community."

International students are required to show proof of English ability before being accepted into the school.

It is one thing to say the test has been so "accused," and quite another to show proof.

If they beam someone aboard, we can show physical proof, and perhaps be free within a few hours.

I promised that if she showed me proof of her claims, I'd make it right.

Must show proof of age or student status if asked.

Women who show proof that they are 18 or older will be able to buy them without a prescription.