Property car

How can you prove/ establish the fact of purchase of bunglow in a Cooperative Society without execution of a sale deed ? 

Vague and confusing facts can not lead to for proper opinion and oblige.

Redraft

it would be better to consult a local prudent lawyer for appreciation of facts / documents. professional advise and necessary proceedings.

share certificate is issued by society

No definite suggestion is possible unless the documents are seen and perused.

Share certificate issued by Society and title of property are two different connotations / subjects governed by different laws.

In which State is the co-operative socety? Is it a premises type cooperative society or building type co-operative society? In a premses type co-operative the land as a whole belongs to the society and members construct their own house on the plot alloted to them. In a building type co-operative society both land and building belongs to co-operative society. In a building type co-operative society if the property was in Mumbai and it was transferred before 1980 transfer would involve transfer of shares only and there was no stamp duty  In 1980 the Bombay stamp act 1948 was amended and tenancy right also became an immovable property subject to stamp duty. Property card in Mumbai is for the owner of the permanent element in the property, which is the land on which the property is situated. To the best of my knowledge, property card will be issued to the co-operative society and not to individual members.