Legal Question in Criminal Law in India

The crucial fact you have missed is whether on the date when the document is alleged to be signed your mother was alive or not. If the property belongs to your mother then mother's signature are required on the document. Your signature are meaningful after the death of your mother. But in that event you could only transfer right to the extent of your share and not more.

you must apply for a declaration that the paper signed by you be canceled being void on the ground that you have no right to sell the undivided share and the property is still in the name of your mother. you can elaborate the circumstances under which you executed the papers.

U may file suit 4 declaration & injunction against ur said frend for claiming any title from the said paper as being void , on the other hand property can't be transfered on unregistered document,the said document is can't be used ur lifetime but same can becomes an important document after u.