When getting an apostille on an Arizona marriage certificate, you'll need an original or certified copy of the document. You can get one from the county where you were married or through several online websites that offer that service at a premium price. Once you receive the document, you'll have to obtain the apostille from the Arizona Secretary of State's office in Phoenix or Tucson.
There is no margin for error with the Authentication or Apostille process. If mistakes are made, both your time and money will be wasted and you'll have to start all over again. If you want to look into outsourcing this part of preparing to studying abroad to someone with experience, please email me at email@example.com or call 848-467-7740 to request my services or learn more.