In the 1800s, Fargo's lenient divorce laws gave it the nickname "Divorce Capital of the West." At the time, there were no restrictions whatsoever on divorcing.
Fargo's divorce laws were amended in 1877 to require 3 months of residency. However, this just meant people registered a hotel for three months and then left on the train they came in on. This process was known as the "Ten Minute Divorce," as that was the length of time the train remained in Fargo.
The practice finally stopped in 1899 when the law was changed to require 1 year of residency and proof of U.S. citizenship.