[mothered]

Do you think a DNA would work then in this scenario?

In terms of the following, do they simply look at the ID without taking any record (photocopy etc)?

Present any form of ID to pick up package , it's not scanned or anything

Yes all they do is look at the ID to check they are who you say you are. No scanning of the ID is involved.

That's a huge advantage- they cannot cross-check Identification details, nor verify whom the package was handed to.

Given they do not keep ID records, as far as you're concerned, the package was handed to someone else.