<prompt> Human: I received a bill from my eye doctor 3 years after services were performed. Doesnt look like my credit card statements will go back far enough to show that i did in fact pay and no longer have the receipt. my insurance also does not have anything on record, even though my other yearly visits are. What are the next best steps in challenging a bill that is so old? Is there a statute of limitations on how long someone can wait before sending a bill I live in CT? Should i first reach out and get all the information from them that i can?  <response>: How about a big fat no. Unless they have a really great reason for the delay, a three YEAR wait to be presented with a bill is unreasonable and forces you to extraordinary efforts to protect against double billing. 