Obtaining a certified copy of a marriage certificate - USA Government
For marriages that took place in the U.S., reach out to the state's vital records office where the marriage occurred. They can provide information on the fees, procedures...

Locate Marriage Licenses - Indiana judiciary online portal - Indiana Government

Marriage and Divorce Documentation | Texas Department of State Health Services
The quickest and simplest method to secure a marriage or divorce verification is through an online order at Texas's official site.