What is a reasonable limit for the allowance a student can take from his father, who trusts him? And is he considered extravagant if he spends more than his personal expenses or what he used to take previously? And is his action of placing the amount for a course he did not complete into his father's wallet and concealing it from him correct, and is it permissible for him to reclaim it? And is it permissible for him to take 20 pounds monthly to participate in a volunteer team?

We thank the questioner for his trustworthiness and preservation of his father's money. The father should be asked about his intention behind "take what you want within reason" to determine the permissible expenditures. Regarding the money spent on the English language course: If its incompletion was due to negligence, then the father should be asked for forgiveness or the money should be returned. If it was due to inability without negligence, then there is no blame, and it is permissible to retrieve what was placed in the father's wallet.