Postal tax

Postal tax stamps are used on mail to indicate payment of a mandatory tax on mail. Postal tax is required during specified periods and is used for funding the postal system or governmental projects like disease control, health and aviation. War tax stamps are a form of postal tax stamps.

Often enough, there is nothing on postal tax stamps to tell you what they are. Suspect stamps that are very low value especially when compared with regular domestic postage rates and show subject like those mentioned above.  File:Greece postal tax 1918.jpg|From Greece, issue of 1918. File:Cuba half cent ornage Victory.jpg|[Cuba File:Iran postal tx.jpg|Iran File:Jordan postal tax.jpg|Jordan File:Macao Pombal postal tax.jpg|Macao, on of the 3 Pombal designs used by all the Portuguese colonies File:Romania aviation fund.jpg|Romania 

See

 * Plan Sur de Valencia, with Spanish local postal tax stamps.
 * War tax

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