Is it permissible for the woman in charge of collecting donations for a charity project to deduct from the incoming donations the amount she personally donated in advance, while keeping the rest of the new donation with her instead of transferring it to the center, under the pretext of difficulty in transferring?

If you donated money to dig a well, and then wished to recover what you spent from a new donation, there are two scenarios:

1. If the donation has reached its intended recipient: You are not permitted to recover the money, because revoking a donation is forbidden, and the new donor has not authorized you. Al-Hafiz Ibn Hajar said: "They have agreed that it is not permissible to revoke it after possession." The Prophet, peace and blessings be upon him, said: "The one who revokes his gift is like a dog that vomits and then returns to its vomit."

2. If the donation has not reached its intended recipient, but has reached the intermediary organization: You are permitted to revoke it and take the money for yourself, because the money is still in your possession. Al-Nawawi said: "Whoever gives to his agent... a voluntary charity, his ownership over it does not cease until the recipient takes possession of it." This is the view of most jurists.