Banks that use chexsystem and ordering checks

I have had an account with a local credit union for almost 7 years. I have never had a problem with them. I overdrew it once but went and made a deposit right away and everything was ok. I had another checking account with WF and I am not sure whether or not they put me on chex bc they didn't close my account when I requested and overdrew it by allowing the second mortgage go through (even though I had canceled the automatic withdrawal before). Anyways, I needed to order new checks from my credit union and was wondering if you think if Harland will run a chexsystem report or not? I am not sure I am on chex but I know that the check manufacturers sometimes use chex and report you to your bank and then the bank closes your acct. Any thoughts on this? Thanks