In our Co-operative Housing Society at Mumbai, there is one garage bought by one person in his partnership/proprietorship firm name. He had expired and one of his sons claiming to be proprietor was dealing with the property. The person who had expired is suvived by his wife, two sons and one married daughter. The son has offered to surrender the garage to the Society and asked the Society to consider payment of Goodwill amount of Rs. 5 lakhs. The mother (of the son who claims to be proprietor) is very old and will submit notarised document since she cannot go out for registering the document. His siblings are willing to submit any document the Society asks for. Is it necessary to make the siblings as confirmng parties to the sale deed. If so, how to insert the wordings in the surrender deed. It was decided to mention surrender and not sale and also goodwill amount to avoid tax.