[mothered]

I've also got a few DNAs planned I normally lock my front door and leave my exterior door open so that delivery people can leave parcels there safely.

Where exactly Is the package placed when there's access to the exterior door?

Should I lock the exterior door so the delivery guy is forced to leave it in the open making my claim more believeable?

It could go either way:
1. The package left exposed for anyone to come along and steal It.
2. The driver refusing to drop It off due to not having access to leave It In a (more) secure spot.