What should I do to obtain his death certificate?

You need to submit a certificate.

He is working hard to acquire new skills.

He is studying every day to acquire new skills.

His opinion is insignificant.

I can't find my birth certificate.

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.