This certificate of value proves the value of the product.

Please remember to bring your travel documents.

I forgot my identification papers, so I couldn't open an account at the bank.

I had a hard time finding my birth certificate.

May I show you my proof of qualification?

He was researching old records at the public records office.

I bought a new study aid for my math exam.

He is an expert in computational linguistics and is involved in the development of artificial intelligence.

What procedures are necessary to obtain his death certificate?

I obtained the natural coat certificate for my dog.