[Waifu]

I’m thinking of using DNA because it seems like the delivery driver left the package at the door with no clarification that someone was there to accept it.

What do you mean by "It seems like?".

Was It left unattended at the doorstep without any form of delivery verification, signature or otherwise?

Yes, I don’t think the driver seen anyone take the package. They just left it there and went.

They have basically DNA'd themselves by doing that. If like you stated, left the parcel at your door without requiring a signature, then a DNA is the perfect SE method for this scenario. What do you think @mothered?