Soecific gpoa to sell flat in mumbai

You have a POA deed executed in your favor for performing this task hence you can very well proceed with the completion of the task entrusted to you. 

Yes, you are authorised to get the sale deed executed and receive consideration on behalf of your son, the executant of GPA.

As in latest supreme court judgment mere POA cannot entitle one to transfer of propety but there should be other releated documents to prove that the POA was consented .

Read ;

Ghanshyam v Yogendra Rathi 2023

 

You can proceed with the execution of the sale deed in favor of the prospective buyer on the basis of the registered power of attorney deed in your possession.

The ratio of judgment in Ghanshyam V Yogender Rathi 2023 (Supreme Court) is qua conferment of title through Agrement to Sell, PoA and/ or Will, which is inapplicable in instant case.