title suit filed by POA holder

Power of Attorney can file cases on behalf of principal. the authority to act for another person in specified or all legal or financial matters

Dear Amiteshji

Yes

POA Hilder can file suit on behalf of the Grantor of POA and can argue also on his behalf in ceratin conditions.

And Not only this but he can depose, too to the extent of his direct involvemenst in the transaction. In Other words the work/deeds/transactions done by him personally on behalf of the Grantor of POA Holder

What do you mean by  "any recent ruling by Supreme court regarding the same"

Be specific

HARIOM