Should we declare these samples even though they're free?

How to say “Should we declare these samples even though they're free?” in Japanese

In Japanese

このサンプル、無料(むりょう)でも申告(しんこく)する必要(ひつよう)ある？

Kono sanpuru, muryō demo shinkoku suru hitsuyō aru?

Should we declare these samples even though they're free? in other languages