The opening of Postal Service retail centers in dozens of Staples stores around the country has the postal unions upset.
The deal with Staples began as a pilot program in November at 84 stores in California, Georgia, Massachusetts and Pennsylvania.
The goal was to make it easier for customers to use the post office without actually having to go to the post office.
The Unions are threatening protests and boycotts because the new outlets are staffed by Staples employees, not postal workers.
The dispute comes as the financially struggling Postal Service continues to form partnerships with private companies, and looks to cut costs and boost revenues.
Union leaders worry that if the program works it will be rolled out in more than 1,500 Staples stores nationwide.
The union says that they are OK with the program they just want the counters staffed with postal workers.