People need to understand that this "I moved/changed address" shit is NOT a source's responsibility.
Thankfully in this specific case the source could determine it was a long-time loyal customer and does not sound like a big cost issue -- so the source ate the loss and took care of the customer.
But, as others mentioned, people can fill out the change of address forms with the post office (after all, how will your other mail find them?).
IF someone loses some mail because of the move, well that is part of moving (not the sender's fault).
When a purchase is made from a source (or anyone) and is mailed to the address the customer provided, the source has done it's part; the seller should not be expected to eat the losses for the customer's choice to move.
It does also create legal risks because the new owner/resident (or landlord if it was a rental) may receive the pack, open it, and turn it over to LE; there is potential that LE may pursue it and will most certainly first look for the former resident. While unlikely, it is never good to add any extra risk.
Finally, and to be clear
I am NOT accusing anyone here now, but in general there has been this type of story multiple times recently and I see the potential for scammers to run such a story to rip off kind sources.
If people see the source's kindness, there will be some who try to take advantage. For example, use a buddy's address for the first pack, then claim to have "moved" so a second pack is sent to the "new location."
How can a source resolve this?
Thank you
@Pharmacom Labs for stepping up and going above and beyond. Your kindness is appreciated and saves us all a bunch of headaches debating.
But be careful with possible scammers that copy-cat this scenario.
IF a customer provides an address and the source ships to that address (tracking will verify the pack is shipped etc), the source has completed it's obligation.
Finally, to others who may be friends with others sources, warn sources of the scam possibility because I personally have heard of this exact story at least 3 times in the past couple months.