Ruling on giving charity from one's parents' money without their knowledge

Question:
The last question is from our sister, who asks: What is the ruling in the Shari'ah regarding a person who gives to the poor or donates from his father's money, or gives to someone who asks for a need from the house, without informing his father or mother, and he does not know whether they will agree or not?

Answer:
He has no right to dispose of the property except with the permission of the owner. If the money belongs to his mother, he must seek her permission; if it belongs to his father, he must seek his father's permission. This excludes what is known between them to be permissible, such as leftover food and similar items where it is customary to spend on the poor; in such cases, there is no harm. As for something where it is not customary between them to give it out without permission, he must seek permission. And something where it is customary that no permission is needed does not require permission. People differ in custom; cities, villages, and desert areas differ in this regard. So, if the son knows that according to his father's and mother's custom, they do not object to giving charity with this thing he did, there is no harm. If he is in doubt about it, let him seek permission. If it is from his mother's money, he seeks her permission; if it is from his father's money, he seeks his father's permission. He has no right to dispose of what he does not know they permit without their permission. And Allah is the One to be asked for help. Yes.