QuickBooks Error 12031 correctly says contact Financial Institution. Point to note here is that this error is not a QB application internal error, it is an external error. It may be a temporary issue. Try again ideally at a less traffic jam. QB 12031 OL-206 says try again later. If the still problem remains, contact the financial institution. Because if they can’t help it may harm the file. There is another you also must be looking at it as it was described in the QuickBooks Support +1-877-263-2742 and tells a lot about things associated with this particular error.