(3)Where a motor vehicle is held under a hire-purchase or lease or hypothecation agreement, the registering authority shall, after assigning the vehicle a registration mark under sub-section (2), inform the person whose name has been specified in the certificate of registration as the person with whom the registered owner has entered into the hire-purchase or lease or hypothecation agreement (by sending to such person a notice by registered post acknowledgement due at the address of such person entered in the certificate of registration the fact of assignment of the said registration mark).