-snip- I have to ask the following. What is date of transaction which fed the mentioned address with those 1000 free dogecoins? Does this date coincide with the date when your sister created the new SEED for purchased Nano x or that trx is dated earlier/later?
He already provided those information in his reply containing updates:
/index.php?topic=5507888.msg64483338#msg64483338Oh, thanks, I didn't pay attention to his update. Nevertheless, regarding this updated story, starting out from the assumption that someone else has the same address OP could probably transfer
let's say 100 dogs to other address including OP_Return message into trx
which is addressed to that supposedly existed user and see what will happen next.
Allegation in predetermined/faulty SEED generation is too serious to be leaved behind.