Package tracking says delivered, customer states not there.

I've been reading a few posts but just want some clarification. I get these quite often where USPS marks the package delivered but the customer says they never got it. I knew this actually does happen occasionally (or they weirdly deliver it the next day). For the longest time, I just send out a new one. At this point, I'm tired of spending money and product just to please the customer. I've seen people send their customers to A/Z Claims for a refund, does that take the refund money from me? What if Amazon sides with the customer? I always use Amazon Buy Shipping for my items.

TIA

complete message for reference

Oct 27, 2023 10:45 PM

This print was a gift for my sister. She called to tell me it never arrived. I checked the address and everything I provided was correct. I will need a replacement since she never received hers.

Ship by

Oct 3, 2023 2:59 AM EST

Deliver by

Oct 11, 2023 2:59 AM EST

Carrier

USPS

Tracking Number

9300120111411054144884

Status

Shipped

Date Shipped

Oct 2, 2023 1:39 PM EST