It was stuck so I believed it will be abadoned in time.
This is a bad assumption: once broadcasted, someone can always broadcast it again. That means it can get confirmed later, unless you make the transaction invalid by double spending the input to another address.
I asked the owner of the wallet 3FcJ5qSBExencX5eowGJwrPBnfKX41FrXK if he received another payment and he told me checked on his ledger wallet GUI and he received it but it was tagged as double spending and then the print screen he sent me only show one TX.
I checked a block explorer and you can see the two txs. What is happening how can he confirm the other tx ?
I have no experience with Ledger, but the transaction is confirmed and he received his payment twice (
here and
here).
Could I receive BTC from a wallet and check +6 confirmations and then lose those BTC because the same BTC were sent to another wallet with a high fee but "abandoned"
No. For this to happen would mean miners have to forget the last 6 blocks. Think about 51% attacks for this scenario to happen.