Forget in last post. You can get the Mass. Fast Lane (same as EZ pass) on line through the Mass DOT or we actually just went to EZPass.com and got ours through the NJ website. We have never had any problems. We have been able to get into our account info to update new vehicles that replaced others, and we had one transponder lost and were able to report it on-line and taken off our accout. We were then able to order a replacement and even though it said there was a $20 replacement fee we were never charged for it. Check both sites to see if there is any difference in fees for joining or losing transponders. Depending on where you are in Mass you may be able to find a close location and just go get it. My family is in Mass and they have them and ours is from NJ and none of us have had any problems. We get our monthly statement, when there is usage, on-line.