The registered sale deed in your mother is enough to prove her title and ownership of the property. She need not show the source of income for purchasing the property.
Law defines this as married women property and it further clarifies that she need not declare the source of income for purchasing this property.
Even if she is not having any source, if the property was funded by someone but registered on her name, then also she is the absolute owner of this property.
"No Objection Certificate" of the Society is not
required to transfer the shares and interest of the
transferor to transferee. However in case such a
certificate is required by the transferor or transferee,
he shall apply to the Society and Committee of the
Society may consider such application on merit, within
one month.
(e) The Transferor/Transferee shall submit following
documents and make the compliance as under:
i) application, for transfer of his shares and interest
in the capital/property of the society, in the
prescribed form, along with the share certificate;
ii) application for membership of the proposed
transferee in the prescribed form;
iii) resignation in the prescribed form;
iv) stamp duty paid agreement;
valid reasons for the proposed transfer;
vi) undertaking to discharge all the liabilities to the
society by transferor;
vii) payment of the transfer fee of Rs. 500/-
viii) remittance of entrance fee of Rs. 100/- payable
by the proposed transferee;
ix) payment of amount of premium at the rate to be
fixed by the general body meeting but within the
limits as prescribed under the circular, issued by
the Department of Co-operation/Govemment of
Maharashtra from time to time. No additional
amount towards donation or contribution to any
other funds or under any other pretext shall be
recovered from transferor or transferee.
x) submission of 'No objection' certificate, required
under any law for the time being in force or order
or sanction issued by the Government, any
financing agency or any other authority;
xi) the undertaking/declaration in compliance with
the provisions of any law for the time being in
force, in such form as is prescribed in the bye laws.