Are we all finally in agreement that Signature Confirmation, once the gold standard for proving delivery, is no longer useful on Amazon?

I keep seeing people coming to post that despite Signature Confirmation, they lost an A to Z blah blah blah...

If I am wrong, please direct me to the help page or other reference stating otherwise...

Hello Fellow Sellers,

I am seeking your advice and support regarding an issue we recently encountered with an A-to-Z claim on Amazon. We lost a claim even though we provided FedEx signature confirmation showing that the package, valued at over $2000, was delivered and signed for by the recipient.

Here are the details:

The customer filed a chargeback stating they did not receive their package. We provided FedEx signature confirmation indicating the packages were delivered and signed for at the delivery address. Despite this evidence, Amazon sided with the buyer, forcing us to refund the order. This decision seems extremely unfair and undermines the reliability of using signature confirmation as proof of delivery.

When we appealed, the response we received was, "Even though we understand your position, we stand by our decision."

Last week I received an FBA order for a $130 product I've sold thousands of times over the past 2 years. But this particular order came with a message from Amazon that said, "Signature Confirmation Recommended." I've never seen that before.

I'm not sure why this order was special but I paid the extra bucks for signature confirmation and sent it on its way. My *hunch* is that the customer had a history of excessive returns but really, i have no idea.

Sure enough, a few days later I get a message from the customer that the package never arrived. I checked the tracking and signature, did a little free online sleuthing, and discovered that it had been signed for by a relative of the recipient. So I was able to relay that very specific information to the customer, who was of course "outraged" that I would not refund the sale in full.

I told her to contact Amazon Customer Service as I could not help her -- betting that she wouldn't do that because she knows her abusive history. That turned out to be correct, as she continues to contact me and apparently won't reach out to Amazon. She also has not written a negative review.

So two questions:

1. I continue to answer her messages by sending a copy/paste of my original response. (Learned that technique from seller support!) Should I report the messages if they continue? I haven't yet because I worry that someone in SS will actually give her the refund.

2. Does this experience square with other sellers who have seen that Shipping Confirmation Recommended message?