[mothered]

they are delivering the goods with Royal Mail

What Items are you SEing?

they are delivering the goods with Royal Mail. How do I handle this? My plan is to do DNA,

Contact the company the next day and say that you're still waiting for the package to arrive.

They might ask for signature as this is a signed for delivery.

Perfect.

It's a useless form of delivery verification, for the fact that anyone could've signed - even the carrier driver.