No, it’s never a good idea to take a lender’s advice when it comes to improving your credit scores. Lenders didn’t build the FICO scoring system and don’t understand it well enough to give anyone advice on how to improve his or her scores. Closing accounts can drastically lower your FICO scores for several reasons.
Specifically, closing an account will lower your overall credit limit and thereby increase your revolving utilization percentage. Ideally you want this percentage at 10 percent or lower. Also, closing an account, especially a older account, will make your credit age become younger overall, and the older your credit age, the better.