1. Verify on their website that they are certified for your county
2. Verify with your county clerk's office that they still accept certificates from this provider
3. Ask your clerk of court if original signatures are required. Some counties require the original (not printed) certificate of completion. In that case, you will have to take mailing time into consideration when deciding between an in-person course or an online course. 

ABeautifulCeremony.net: Click here

The Relationship Learning Center: Click here

Living the Dream: Click here

FLPremaritalCourse.com: Click here