My apartment's leasing office accepts UPS/USPS/FedEx/etc. packages on my behalf when I'm not available. Whenever I go in to pick up a package, they ask me for b

My apartment's leasing office accepts UPS/USPS/FedEx/etc. packages on my behalf when I'm not available. Whenever I go in to pick up a package, they ask me for both my ID and my signature on a tablet. Immediately after I tap the 'Confirm' button, I get an email with a PNG of the signature I just "signed". When I first moved into my apartment, I made some effort to give my regular signature. Nowadays, I just make a couple waves with a single finger movement which looks like nothing out of the alphabet. The mailroom staff really couldn't care less how I sign since they've already looked at my ID. I always wonder what the point of the signature is in this scenario.