Is it permissible to pay the seller in cash dinars for a code that the buyer charged on a website and used to purchase programs, knowing that the dollars cannot be withdrawn or sent from the website, and the exchange did not take place in the مجلس (session/gathering)? Or is it incumbent upon the buyer to purchase dollars from another person and pay them to the seller? And is it permissible for the seller to demand an increase in the price due to the service?

If the condition of immediate possession (al-qabḍ wal-taqābuḍ) is not met in the currency exchange session, the contract becomes void, and the amount taken becomes a debt owed by the one who received it. An equivalent amount must be returned without any increase to avoid usury (ribā). The malfunction of the application used for the transfer removes the burden of sin from the questioner, but it does not rectify the invalid contract. Consequently, the questioner is indebted in dollars and must return an equivalent amount. He can repay the debt in his country's currency at the exchange rate on the day of payment if the creditor agrees, based on the hadith of Ibn Umar (may Allah be pleased with them both): "There is no harm in you taking it at its value on that day, as long as you do not separate while there is still something between you."