I recently sold about 0.13 bitcoins (about 500 EUR) but the guy who bought it said that he would complete the payment in 2 hours, after he said that he confirmed the payment without doing it.
Now I don't know if release or not the Bitcoins, I didn't recieved nothing in my Visa card, but I'm still waiting.
What will happen if I don't release the bitcoins?
Please help me, thanks.
Don't release until you see your payiment. And remember that some kind of payement are reversible (like paypal or skrill) and for other one's like bank transferis better to ask for a selfie with ID card to prove thate the sender is the owner of the account.