If your father passed away without a will, his property is legally shared among his heirs. To transfer the shop solely into your name, all other legal heirs, including your mother, must sign a registered release deed relinquishing their rights. If an heir is unable to attend the registrar's office due to illness or distance, they can grant a Power of Attorney or arrange for a registrar to visit their home. If an heir passes away before signing, their share will pass to their own legal heirs, who will then also need to sign the release deed.