Where I work there are a lot of courier pick-ups and a (not-so) surprising number do not read the instructions.
No, dude, we are not handing over the legal documents until you tell us who they’re listed under (clients arrange for and pay for delivery and are instructed to use the name of who applied as a pick-up name). Most times the instructions are right there on their device. I have seen it. The difference is if they don’t pick up, it’s harder to lie about than fucking up on drop-off. So we can say “check your instructions or call your dispatcher” and they do it because there’s no CYA. But a lot don’t know how to check those instructions. So with you, they can shrug and say “It’s delivered.” and push it on you to prove otherwise.