A OneTime Showing Agreement form is a legally binding agreement between the buyer's broker and the homeowner listing the property for sale. How do I request a copy of my Card Agreement?But you will either need to be a citizen of Mexico, or have a passport from another country with automatic visa approval or a visa. The Treaty of Guadalupe Hidalgo, that brought an official end to the MexicanAmerican War (18461848), was signed on February 2, 1848. Also, most forms and contracts for North Americans are in English; however the Spanish version is the only document that has any legal standing in Mexico. Use USPS PO Boxes for business or personal use. Learn how to reserve, rent, renew, and manage a PO Box online, as well as how much a PO Box costs. Preceded by, Succeeded by. President Polk had recalled Trist under the belief that negotiations would be carried out with a Mexican delegation in Washington. At the heart of our mission is stewardship on issues surrounding agriculture, food, security and conservation.