Is discharging a debt on behalf of the creditor sufficient to fulfill a vow made to give charity of that exact amount?

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Discharging a debtor's obligation to the amount vowed for charity does not suffice to fulfill the vow, even if the debtor is eligible to receive charity. This ruling is held based on the principle established by Ahmad, requiring actual possession (qabd) of the charity. Since charity requires transferring ownership (tamleek), and discharging the debt is a cancellation (isqat), it is invalid, similar to the ruling concerning Zakat.