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UPS’ less-than-truckload branch, UPS Freight, has warned shippers that they may need to “seek alternate arrangements” for their shipments for after Nov. 8, given uncertainty over labor negotiations with its drivers and their union, the Teamsters.

In a notice issued Wednesday, UPS says it and the Teamsters Freight National Bargaining Committee “concluded the current round of discussions on October 25,” adding that the company “believe(s) should be ratified.”

Voting is scheduled to take place at local Teamsters halls between Nov. 7 and 11, UPS said.

The company said, in the event that the bargaining deal is not ratified, UPS Freight