Should someone fast on behalf of a deceased person who owed fasts, or only feed an expiation?

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The obligation for the deceased who had the opportunity to make up fasts is to feed one poor person for each day, which is the view of the majority, supported by reports from Aisha and Ibn Abbas. The reasoning is that since proxy performance (Niyaba) in fasting is not permitted during one's life, it is likewise impermissible after death, analogous to prayer.