ZA, ZM, ZC Zielona Góra: ZG, ZE, ZN The following codes were used for special forces: Militia/Police: MO Military: U Border Guard: HW "Nadwislanskie" Troops of the Interior Ministry: HN Foreigner plates (in green background): I Test plates (in red background): X Special plates: Diplomatic: XY 12 345, The first two numbers are denoting the region of ambassador (e.g. 02 - Germany) and blue background. Temporary: X 12 34 56, with yellow font. 2000–present Since the year 2000 Polish car plates have black letters pressed onto white reflective blanks with an EU stripe and country code. The switch was made to conform with other EU countries and to increase visibility. The licence plates issued until May 1, 2006, bear a Polish national flag. Plates issued after that date have the 12 EU stars instead of the flag. See also European license plates References External links Reference aid for looking up Polish registrations issued between 1976-2000 (Mac OS X) Details about plates in Warsaw Road transport in Poland Poland Poland transport-related lists Registration plates