Dissolution of Czechoslovakia
Since the federalization in 1968, Czechoslovakia had divided citizenship, either of the Czech Socialist Republic or of the Slovak Socialist Republic (the word 'Socialist' was dropped from both names shortly after the Velvet Revolution). This distinction, however, had little effect on the citizen's life. On January 1, 1993, all Czechoslovak citizens automatically became citizens either of the Czech Republic or the Slovak Republic, based on their previous citizenship, permanent residence address, birthplace, family ties, job, and other criteria. Additionally, people had one year's time to claim the other citizenship under certain conditions.
Mexico–Slovakia relations
In December 1992, Czechoslovakia was split into Slovakia and the Czech Republic. Mexico established diplomatic relations with newly independent Slovakia on 1 January 1993. Initially, Mexico maintained diplomatic relations with Slovakia from its embassy in Prague, however, in 1996 Mexico accredited relations to Slovakia from its embassy in Vienna, Austria due to its close proximity to the Slovak capital of Bratislava. During this time, Slovakia opened a resident embassy in Mexico City.