After spending a large amount on organizing costs, the Teamster union apparently has thrown in the towel when it comes to trying to unionize FedEx Freight drivers.

The company reported that the National Labor Relations Board has issued an order that officially revoked the certification of the Teamsters union as the collective bargaining representative for city and road drivers at the FedEx Freight location in Monmouth Junction, N.J.

This order is a result of the International Brotherhood of Teamsters, Local 701 “disclaiming interest in representing the FedEx Freight employees in this location,” the company reported.

The revocation comes after FedEx Freight drivers in Croydon, Pa., and Charlotte, N.C., chose to vote the union out.

To date, at three of the four FedEx Freight locations that originally voted for Teamster representation, the Union has either been decertified by employee vote or voluntarily decided not to continue as bargaining representative.

“Our thriving and open work environment provides a flexible, team-oriented and customer-focused work model, and our people-service-profit philosophy remains at the core of our success and forms the foundation of the unparalleled service that FedEx delivers daily to our customers worldwide,” says FedEx Freight President Michael L. Ducker.

The Teamsters put years of effort into attempting to organize drivers for FedEx Freight, which is the company’s less-than-truckload division.

In addition, the union was stymied after organizing a handful of terminals for the FedEx Ground division following years of expensive litigation that successfully challenged those drivers’ independent contractor status.