Picked up a ez pass on the way out to get RV at a rest stop ez pass store put in window go thru toll nothing call ez pass they say need special ez pass for RV will send one out get new pass go thru toll nothing call ez pass give number they say we gave you wrong one for RV send us one that is blue put in RV go thru toll nothing again call ez pass they say blue one for towing only send another one out to us last time out worked on one of four tolls. This is what was meant by wrong ones. So this is why we are posting to see if we are just lucky or others have had these issues.thanks again for replies. We live in vermont so no tolls here.