An easy solution - open the package when the delivery person comes or when you pick it up from the delivery office. The delivery person can take a photo and act as a witness. If you take the package from the local delivery office, there are cameras and staff, so I can't just swap a ripe apple for a rotten one.

Where I live we don't have the habit of just putting the delivery on the porch for a few reasons. First, it's ridiculous if you think about it - no one signed for it, so how could you mark it as delivered? I don't get the US in that regard. Secondly, most of the houses have fences, so the delivery person can't come to the house even if they wanted to. You're basically required to meet the delivery person.