Learn how to expertly draft and utilize NWMLS Form 22D. Parties involved in a Washington real estate contract should include a financing contingency clause in this section.An acceleration clause in a mortgage or trust deed stipulates that the entire debt is due immediately, if the borrower defaults under the terms of the contract. The FHA amendatory clause protects both the buyer and lender from getting stuck with a property worth less than the agreedupon price. Some important contingency clauses should include financing, home inspections, closing costs, and the closing date, among others. The first clause on the addendum is the square footage lot size and encroachments clause. We will also discuss the title insurance Clause. A power of sale clause written into a mortgage contract authorizes the mortgagee to sell the property in the event of default. I. Contract Classifications. A. Express vs. implied.