[Waifuu]

DNA is a good method even with a signature. This is because you can easily fake one so they can't comfirm 100% that the parcel was delivered to you personally.

Absolutely correct.

OP read: https://socialengineers.net/2020/08/the-dna-method.html

Thank you for your ressource !
if the agent tomorrow starts an enquiry on the phone, should I switch it off and call back or let the enquiry continue?

An investigation does not automatically mean your claim will fail. In your position, if they do start one, I would not panic and simply comply with their request. The rep is usually just following their internal protocols. Read more here: https://www.socialengineers.net/2020/04/...ation.html

If you do get stuck, feel free to reply in this thread.