A foreign exchange agreement is a legal arrangement between two parties where money is exchanged internationally at a certain exchange rate. Find foreign exchange agreement lawyers for Arizona to hire.No cost to post a project to get multiple bids in hours to compare before hiring. Looking for a Buy-Sell Agreement attorney? Pennington Law, PLLC offers expert legal guidance to protect your business interests. An Arizona business purchase agreement is a legally binding document that outlines the terms of buying or selling a business. We may charge a foreign currency conversion fee for such transactions (see Important Terms of Your Credit Card Account for more details).