E
Entering a private residence without permission is illegal.Unless the guy did anything wrong such as look around or take anything then this could get him in trouble simply for trying to do his job. I appreciate walking in the house isn't exactly his job but if he's just trying to deliver the package then this could get him in trouble for trying to give good service. I'd have probably had a word with the guy and just pointed out that it's not the best idea in future to walk into someone's house and left it at that.

