Purpose: Procedural justice is important for fostering peoples’ willingness to cooperate with police. Theorizing suggests this relationship results because procedural justice enhances perceptions that the police are legitimate and entitled to be supported. The purpose of this paper is to examine how legitimacy perceptions moderate the effect of procedural justice policing on Muslims’ willingness to cooperate with police.

Design/methodology/approach: Survey data from 800 Muslims in Australia are used.

Findings: This study shows Muslims’ procedural justice perceptions are positively associated with two types of cooperation: willingness to cooperate with police in general crime control efforts; and willingness to report terror threats to police. Muslims’ perceptions of police legitimacy and law legitimacy also influence willingness to cooperate. Specifically, police legitimacy is more important for predicting general willingness to cooperate with police, while law legitimacy is more important for predicting Muslims’ willingness to report terror threats. Importantly, legitimacy perceptions moderate the relationship between procedural justice and both types of cooperation. Specifically, procedural justice promotes cooperation more strongly for those who question the legitimacy of police or the legitimacy of counter-terrorism laws, but the moderation effects differ across the two cooperation contexts. The findings have implications for procedural justice scholarship and for counter-terrorism policing.

Originality/value: The current paper examines an under-explored aspect of legitimacy; it examines police legitimacy perceptions, but also examines how people view the legitimacy of laws police enforce (i.e. law legitimacy). It is argued that perceptions about law legitimacy can also impact people’s willingness to cooperate with police.