If our guest visits at our home before 2-3 days of eid, and on the last Eve of ramzan if they do iftari with us, so we have to give any sort of fitr or what? Please guide me for the same.

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It is obligatory to pay the fitrah of a guest who arrives at his house before sunset on Eid ul fitr night

This is the ruling of Ayatollah Sistani saheb