Malayan Postal Union

The Malayan Postal Union was formed in 1934 by the Straits Settlements and the Federated Malay States.

The members continued to issue their own stamps after this date but did create postage due stamps for common use. They were overprinted for use during the Japanese occupation (1941-45). After World War II, common postage dues were also used by the new additional members of the Federation and Singapore.  File:Mal Po Union 1c.jpg|1938 1c value 
 * In 1936-38, a series inscribed MALAYAN / POSTAL UNION was issued.

Japanese occupation
 File:Mal post un occ vert ovpt.jpg|1943 10c vertical overprint 
 * In 1942, a framed overprint with Japanese characters on Malayan Postal Union issues was issued. Forgeries, especially of errors, are known.
 * Also in 1942, DAI NIPPON / 2602 / MALAYA overprints were issued.
 * In 1943, a vertical five-character Japanese overprint was released.

Thai occupation
 File:Malaya Thai occup 3c.jpg|3c value 
 * In October 1943, several states were turned over to Thailand during the Japanese occupation: Kedah, Kelantan, Perlis and Trengganu. Stamps were issued inscribed "THAILAND" but denominated in cents, perf 12½ or perf 12½x11 (except the 1c).
 * British control was returned in September 1945.

Postwar issues
 File:Mal Po Union 5c orange.jpg|1951 5c value File:Malayan postal uni 12c p12.5.jpg|1962 12c perf 12½ (chalky paper) File:Mal post union 2c.jpg|1964 2c value 
 * In 1945-49, the original design was reissued in new colors and values.
 * In 1951-63, once again, new colors and values were issued, now perf 14.
 * In 1964-65, a series on multiple St. Edward's crown and CA watermark paper was released, perf 12½ with some values also perf 12.
 * In 1964, a 10 / cents on 8c surcharge was issued.
 * In 1966, a 50c black value was issued.
 * The states of the Federation of Malaya replaced these with the postage dues of Malaysia in August 1966. Singapore continued to use these until 1968 when it issued its own postage dues.