Except on eBay, ABE, etc. If buyers still insist, then they have to go to their credit card company.
Amazon is the exception, unfortunately for us buyers.
Go to your post office and ask for the GPS record. It won’t do you much good now, but learn how to do this and you might be able to convince your customer to try a little harder.
I’ve had family members set it somewhere and forget about it, kids ordering and not knowing they actually have a community mailbox and not door delivery, neighbors picking it up when the family member forgot that they asked them while on vacation, etc. etc. etc. Just need to understand how to word this w/o acting accusingly.
and on occasion there is theft, hopefully there is Ring security or some other camera you can remind the buyer of.
very few missing packages are actually theft off the doorstep (I’ve had it happen to me), but most I believe are by bad actors, that being the buyer, of which 90% are actually dropshippers. Look at your invoice, is the buyer name the same as the recipient and/or does the recipient say NO INVOICE. The latter is 100% suspect.