A form of subordination, non-disturbance, and attornment agreement (SNDA) for use in Pennsylvania that establishes the rights and priorities between a lender's mortgage lien and a tenant's leasehold interest in mortgaged commercial property. This Standard Document discusses Pennsylvania SNDAs from a lender's perspective, including matters such as lien subordination, attornment, landlord defaults, lease amendments, and lender protection provisions. This Standard Document has integrated notes with important explanations and drafting and negotiating tips for lenders. The tenant's counsel can also benefit from reviewing the drafting notes of this Standard Document to better understand a lender's position when negotiating an SNDA.