Commercial Lease tenant refusing to pay rent And not honoring post dated checks for business goodwill though confession of judgement signed,optio

The process of enforcing your lease against a defaulting tenant can be complex.  I'm not sure I understand exactly where things stand.  Is the tenant still in the space or has tenant abandoned the property?  Typiclaly you'd file for ejectment and then confess judgment for money and then move on to the execution process to sell the tenant's property and pursue collection against the tenant.  That all involves legal filings that must be done exactly correctly or they won't be enforceable.  Your best bet is to retain counsel.  If you are in Western PA, we would be happy to assist.