Warrant card

The text on a warrant card usually indicates that the holder is granted authority by a specific official to perform the functions of the office held, and may also indicate training to a particular level.

In the UK, police personnel authorized to carry firearms may have an endorsement on their warrant card to that effect.

Usually, the leather flap of the holder is accompanied with "POLICE" in silver leaf and an enamel badge of the force arms.

The Metropolitan Police Service along with other forces offer serving officers a special tri-fold edition wallet with their respective arms and braille bar, with two ID slots.

[3] Neither badge nor wallet denote authority of police powers; they are adjuncts to the warrant card.

Generally, police officers are required to produce their warrant card when requested, even in uniform, but only if it is practical.

Due to the nature of their work regarding national organised crime, it is essential that they are able to exercise certain powers that are beyond that of a regular police officer.

The card is yellow in colour for customs officer and grey for trades control personnel.

There are three different versions of the obverse: "I hereby certify the person whose name and photograph appear on the obverse of this warrant card is a member of Customs and Excise Service holding an office specified in Schedule 1, Customs and Excise Service Ordinance, Chapter 342, Laws of Hong Kong.""...

Allegedly, a number of Hong Kong Police failed to display their warrant cards during the series of anti-extradition protests.

The warrant card has security features designed to prevent identity fraud through impersonation as police officers.