The information which you have submitted is incomplete. Please furnish the following:
In which State and city is your Co-operative Housing Society? There are several ways in which a co-operative housing society is formed. In Maharashtra there are Open-plot type and Flat-type co-operative housing societies. In the first case a group of persons form a co-operative housing society. The co-operative society purchases a plot of land. There with stamped and registered deed for the purchase of the land. The deed will be in possession of the Society. At the most one can get a certified copy of the document. After purchase of land, the Society entrusts the construction of the building to a builder or a contractor. There will be neither stamp duty nor registration for this activity. After the building is constructed, the Society allots flats to individual members. There will be neither stamp duty nor registration for this activity either.
In the case of flat-type societies a builder purchases land and constructs building over it. There will be stamp duty and registration for this transaction. The builder sells flats before, during or after construction of the building. There will be stamp duty and registration for this deed. The purchaser will pay the stamp duty and the registered sale deed will be in his possession after execution.
There are in-between variations between these two extreme types of cases and whether a flat owner will have a stamped and registered document with him will depend on the history of formation of the society and acquisition of flats by flat-owners. Hence an answer or advice can be given only if you give complete and accurate history of formation of your Society.
The officials in banks do not know what all I have written above. Taking possession of documents before advancing a loan is a ritual for them and they do not know the fundamental need behind it. They just go by the Rule Book. That is the problem.
You answer all my questions and I shall see whether there is a solution.