A mark of authentication affixed to a document or other object typically involves an embossed or inked impression applied to a closure, ensuring its undisturbed state. For example, an embossed emblem on... Read more »
A government-issued mark affixed to mail, signifying official validation and prepayment of postage, served as a critical component of secure communication and revenue generation for postal services. These markings, often embossed or... Read more »
