The General Services Administration in April started background checks on 725 employees as part of the governmentwide identification card project, a federal union said May 30.

But the National Federation of Federal Employees is preparing to challenge GSA’s background check policies. NFFE said GSA refuses to negotiate with the union over the investigation process or tell the union details on how it is conducting background checks and what criteria will be used to determine if employees fail a check and get fired.

Charles Paidock, vice president for NFFE’s Great Lakes Region, said the union may file an unfair labor practice charge with the Federal Labor Relations Authority by the end of the week.

The employees being reinvestigated have been at the agency for fewer than 15 years, Paidock said.