New York City’s Department of Consumer Affairs has served more than 300 subpoenas on independent process servers seeking their global positioning system records, leading some process servers to complain that they’re being unfairly targeted.

Katyusca Abreu, a spokeswoman for the department, confirmed that the subpoenas were issued in December as part of an ongoing investigation into process service in New York. The subpoenas had a return date of Jan. 13. She did not say what the city’s next step would be in the investigation, only that the subpoenas were issued “to ensure they’re keeping legally mandated GPS records to prevent sewer service and make sure that process servers are serving papers when and where they say they are.”