Is it permissible for a person to give up his telephone number in return for the person to whom he gives it up paying his bill, the amount of which is already known?
Praise be to Allaah.
I put this question to my shaykh, Shaykh ‘Abd al-‘Azeez ibn Baaz (may Allaah have mercy on him), who replied as follows:
I do not see any reason why not. Giving up something is more general than selling. And Allaah knows best.
Sheikh Muhammed Salih Al-Munajjid