Same-sex marriages are not routinely performed in the Mexican state of Oaxaca, although judges have issued marriage certificates in individual cases. Although three decisions of the Mexican Supreme Court have indicated that the law should not be interpreted as "defining marriage as a legal union between a man and a woman", five such decisions are necessary for establishing a precedent for same-sex marriage.
State recognition of same-sex relationships in Mexico.
Same-sex civil unions
Same-sex marriages recognized but not performed
On 10 April 2012, a lesbian couple was granted permission by a judge to marry in the state of Oaxaca after an eight months judicial battle, thus becoming the first same-sex marriage in the state. On 26 August 2012, a Mexican federal court judge ordered the state of Oaxaca to perform same-sex marriages based on a recent constitutional amendment which bans discrimination based on sexual orientation. This ruling and two others were reviewed by the Mexican Supreme Court and the Court issued unanimous rulings (amparo) on 5 December 2012 overturning the ban on same-sex marriage in three individual cases. To establish precedent however, five individual cases must be decided this way.
On March 22, 2013, the first same-sex marriage was performed in Oaxaca.