You need to call the M6Toll Customer Services (0870 8506262) as soon as possible. If you lost tag has fallen into the wrong hands it could be being used on the M6Toll, and your account being charged. Once the loss is reported to the M6Toll, the Tag will be deactivated, and will not allowed through the barrier. The Tag will be confiscated by the tolling staff from any driver attepting to use it once it is declared as lost or stolen.