What is the ruling on giving the amount of zakat al-fitr as a voluntary charity with the intention of charity?

Question : The questioner asks: Is it permissible for me to give the fitrah to the poor person and then increase it beyond the limit with the intention of charity?

Answer : Yes, it is permissible for a person to increase the fitrah and intend that what is added beyond the obligatory amount is charity. This is what some people do today; for example, a person may have ten fitrahs and buy a sack of rice, or an amount exceeding ten tons, and give it all on behalf of himself and his household. This is permissible if he is certain that this sack contains what is obligatory upon him or more, because measuring the fitrah is not obligatory except to know the amount. So, if we know that the amount is verified in this sack and we give it to the poor person, there is no blame on him.