Penny Post much needed reforms in the current postal system. On 10 January 1840, the Uniform Penny Post was established throughout the UK, facilitating the safe, speedy and cheap conveyance of letters, and from 6 May could be prepaid with the first postage stamp, known as the Penny Black. Elihu Burritt proposed that a fixed rate of one penny be established for all mail throughout the entire British Empire as a means of facilitating international interaction and international unity. This was known as the Ocean Penny Post. On Christmas Day, 1898, the Imperial Penny Post extended the rate throughout the British Empire
Penny Black people still reused stamps by combining the uncancelled parts of two stamps to form an unused whole, so in 1864 as a further safeguard the top corner stars on the Penny Red were replaced by the lower corner check letters in reverse order. Imprimatur sheets are from among the first sheets of stamps printed from a finished printing plate. The actual imprimatur (Let it be printed) refers to the written permission of the Inland Revenue officials entered on the back of the sheet of stamps. In the 19th century, it was common for officials to remove some stamps from each