In the state of Delaware, if you are in an active bankruptcy and you are way behind in your mortgage, can the mortgage company to proceed with a

So, no creditor in any state can take any action against you or your assets during a case, unless they receive permission from the bankruptcy court.  That is known as a motion for relief which you will have notice of and an opportunity to defend. Although I only practice in PA, I would think Delaware has a similar lien priority statute protecting the rights of prior lien holders.  That means that a 2nd mortgage company can foreclose but it will always be subordinate to the first company's lien.