Refined clarification

I tell you a case Rakesh Kumar is a person who lives in a building and enters into an agreement to give a Certain amount of money to a charitable trust after 5 years with no current rights over the money for the trust. But in the agreement Rakesh Kumar give its full name and no Mr or Mrs and no adhaar or PAN number but only the building address that too without any flat number. Rakesh Kumar has also not mentioned any other identifiers and has written all the proper details in the agreement. Rakesh Kumar has also not mentioned parents name or name of its wife or any relative then based on the identification details like only full name of Rakesh Kumar and just the building address ( no flat number or floor no) . Is the agreement legally valid ? There could be more people like with the name of Rakesh Kumar living in the same building with same or different genders. Tell me in respect to section 29 of ICA 1872 and the admissibility of section 95 of the evidence act . Can the testimony of witness be taken to clarify uncertainty and moreover tell me another thing that if later after signing of the agreement and affidavit clarifying Rakesh Kumar's identity issues is made on a later date before enforcement of the agreement then would that help in removing uncertainty and make the agreement valid?