One major carrier that entered the Medicare Supplement market last year initially had a very strict clause in their contract that they almost-immediately removed due to agent backlash. It said an agent could not, under any circumstances, replace one of their policies for at least two years.
There is also a major agency out there that recruits with a “free leads” model for Medicare Supplements that says that the owner specifically prohibits you to contact your clients that you've written, after you've written them.
He says in his agent contract that he believes it's in their best interest to be “left alone” and not bothered again by the agent.
“If they don't call you, leave them alone and they will stay.“