[mothered]

That depends on the carrier. I know fed-ex usually asks for signatures while USPS won't

Carriers also tend to be slack, particularly when delivered towards the end of a hard working week, namely Friday. Exhaustion kicks In and they simply wish to finish their shift.  I've had packages arrive where they've signed It themselves and left.

In terms of the OP's concern, Images hold no ground when an Item Is placed unattended at the front door. Simply say It wasn't there on your return home. Do not provide excuses such as "the Item was stolen". You weren't home, so you're not to know whether It was In fact stolen. As far as you're concerned, It wasn't delivered.