Is a tallit with tzitzit purchased from a non-Jewish non-merchant valid for use?

Synopsis

A tallit with tzitzit purchased from a non-Jewish layperson (not a merchant) is invalid (pasul), because we cannot presume the tzitzit were made with proper intention (lishmah). The tzitzit must be removed and re-tied by a Jew.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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