A guide to official documents of the state of Oaxaca tells writers to end the address block of a letter with the word PRESENTE, or EDIFICIO for internal mail. It also prescribes the motto “SUFRAGIO EFECTIVO, NO REELECCIÓN” (Effective suffrage, no reelection).
At the UNAM, the guide to official correspondence requires the closing Atentamente, then the institution’s motto, then the place and the date. The motto is “Por mi raza hablará el espíritu” (The spirit will speak for my race), adopted in 1921 under the rector José Vasconcelos.