The NYPD Internal Affairs 20 Years of Service Challenge Coin is a commemorative item designed to honor the dedication and hard work of the officers and personnel who have served in the Internal Affairs Bureau (IAB) of the New York City Police Department (NYPD) for 20 years. The IAB is a vital division within the NYPD, tasked with investigating allegations of misconduct by police officers and ensuring accountability and integrity within the department.