What should be done before resubmitting a claim that has not been paid and why is this important?

Actually first and foremost is to correct any of the basic mistakes that would have happened during the first submission of claim, ie, first the claim should be paid as soon as possible with fine amount if its there any, then check clearly and correct for any typo or signature mistakes, and documents submitting mistakes, then finally resubmit it, as it is very important for the future to get all the good benefits from it in a smooth and easy way.

Sorry its not enough info