(a) Any thing written like a postage stamp, printed or produced in the press or any thing printed or written on the side of the address, that renders it difficult to trace the addressee or makes it susceptible to error in the calculation of the full postal charge, shall not be dispatched by post.
(b) If a postal article violating the provision pursuant to Sub-rule (a) of this Rule is discovered during transportation or prior to delivery, such article shall be delivered back to the sender after levying two times the postal charge from the sender. The postal stamp affixed on such article shall not be considered.