You said "you have to put it there or request it’s done on your behalf"... Which is 100% wrong. As I experienced first hand (never late, good credit, good neighborhood). Aka dead wrong. They declined to tell me exactly what "marketing data" motivated that decision on my behalf. I think your assumptions about innocent 'ol eversource just gee golly shucks making a mistake is beyond naive. There are any number of ways to prevent unauthorized supplier switch without the customers consent, that don't involve preventing them from switching suppliers. Also "they don't care if you switch suppliers" ...not sure you understand how businesses work. Cuz in all their "bend over and lube up" emails I don't see any mention of saving money by switching suppliers. Keep drinking that company koolaid.

"you have to put it there or.." -- This is dead wrong, and exactly the problem. look back a couple days at the stories from local news. It was 'turned on' for my account as well without ever interacting with eversource besides paying my bill. They based it on "marketing data" which smells like a load of 💩

I got some paperwork in the mail from constellation about 10 days after they resent. Other posts on this suggest checking your supplier on your bill, the first cycle after you switch, it should say constellation.