Black and white diagonal flag

Split diagonally, black and white.

Also known as: Unsportsmanlike conduct flag, Warning flag

Safety & hazardSport & gamesStandard profile

Meanings

The signal flag meaning a warning for unsporting behaviour; a further offence will bring a penalty.

Officially standardisedVerified fact
Signals a warning for unsporting behaviour; a further offence will bring a penalty.
Contexts: Public information
Officially standardisedVerified fact
The only flag in the code that warns rather than instructs or informs, so it is the sport's equivalent of a yellow card and exists to make a judgement public before it becomes a penalty.
Contexts: Public information

Visual description

A rectangular flag divided corner to corner, one triangle black and the other white, shown with the competitor's number board.

Symmetry: none
Orientation: upright
Colours: black, white

Confidence

IdentityHigh confidence: High confidence because the identity is defined by a current official standard, but only a single source has been found so far.
Historical originLow confidence: Low confidence because the historical origin is documented in encyclopedic references, but only a single source has been found so far, but early or supporting evidence is limited, but the regional or cultural match to this specific claim is not precise.
Current useHigh confidence: High confidence because the current use is defined by a current official standard, but only a single source has been found so far.
Visual matchModerate confidence: Moderate confidence because the visual match is documented in encyclopedic references, but only a single source has been found so far.

Sources

International Sporting Code and the flag signals of circuit racing
Fédération Internationale de l'Automobile · retrieved 2026-08-27
The international governing body of motor sport, cited for the defined meaning of its flag and board signals. Individual championships add signals and vary procedures, and a record describing a series variation says which series.

Last reviewed 2026-08-27

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Meanings

The signal flag meaning a warning for unsporting behaviour; a further offence will bring a penalty.

Officially standardisedVerified fact

Signals a warning for unsporting behaviour; a further offence will bring a penalty.

Contexts: Public information

Officially standardisedVerified fact

The only flag in the code that warns rather than instructs or informs, so it is the sport's equivalent of a yellow card and exists to make a judgement public before it becomes a penalty.

Contexts: Public information

Confidence

IdentityHigh confidence: High confidence because the identity is defined by a current official standard, but only a single source has been found so far.
Historical originLow confidence: Low confidence because the historical origin is documented in encyclopedic references, but only a single source has been found so far, but early or supporting evidence is limited, but the regional or cultural match to this specific claim is not precise.
Current useHigh confidence: High confidence because the current use is defined by a current official standard, but only a single source has been found so far.
Visual matchModerate confidence: Moderate confidence because the visual match is documented in encyclopedic references, but only a single source has been found so far.

Sources

International Sporting Code and the flag signals of circuit racing
Fédération Internationale de l'Automobile · retrieved 2026-08-27
The international governing body of motor sport, cited for the defined meaning of its flag and board signals. Individual championships add signals and vary procedures, and a record describing a series variation says which series.

Last reviewed 2026-08-27