1. Both parties must be in The Commonwealth of The Bahamas at the time of the application.
2. One party must have resided in the Commonwealth of The Bahamas for not less than 15 days prior to the date of the application; but the Registrar General has a discretion, on good cause shown, to waive this residential requirement. A waiver will not normally be granted unless one party has resided in The Bahamas for three (3) days. The application for the waiver should be made at the same time of the application for the licence.
3. If either party is a minor (a person under 18 years of age) parental consent is required. Forms of consent may be obtained from the Registrar General’s office.
4. If either party has been divorced, the original Final Decree or a certified copy (with a raised or colored seal) must be produced. For European residents, the original Decree or a certified copy (with a raised or colored seal) must be produced in the native language along with a translated certified or notarized copy in English.
5. If either party is widowed, the Death Certificate of the deceased spouse must be produced.
6. If either party is unmarried, for a citizen or resident of the U.S.A., a declaration certifying this fact must be sworn before a U.S. Consul at the American Embassy, Nassau, Bahamas, for a fee of $55 (effective February 1st, 1998), or a Bahamian Notary Public. (Please note, the U.S. Embassy is closed on American and Bahamian holidays.)
7. If either party is unmarried and is a citizen or resident of a country other than the U.S.A., a declaration certifying this fact must be sworn before a Notary Public or other person authorized to administer oaths in that country and must accompany the application for the marriage license. The said declaration may also be obtained at a Notary Public in Nassau. 
8. The parties must produce some form of identification that has a photograph attached. The identification document must be issued by a Government Office in the country where the parties reside. A passport is required for persons who are residents of a Commonwealth country.
9. The parties must produce evidence of the date of their arrival in The Islands Of The Bahamas (i.e., airline ticket, immigration card).
10. Persons desirous of being married in a Family Island (any island outside of new Providence or Grand Bahama) can obtain the Marriage License at the Commissioner’s Office on that Island and need not come to New Providence or Grand Bahamas.
11. The fee for a marriage license is $100.00

NOTE: Marriage licences are issued at the Office of the Registrar General located in the Rodney Bain Building on Parliament and Shirley Street in Nassau, which is open to the public Monday to Friday between the hours of 9:30 a.m. and 4:30 p.m. (Closed on weekends and Bahamian Public Holidays.) On The Out Islands, visit the local Commissioner’s office to obtain a Marriage License.

If you submit an online application for a marriage licence, you will still need to bring the printed, signed, and witnessed paper application to the Office of the Registrar General. Online submission will enable you to receive priority status, and will reduce the time required to process the application and issue the licence.

Proof of Residence

The Registrar General shall be entitled to insist upon proof of residency as he/she deems necessary.

Apostille Copy of Marriage Certificate

For couples from European countries who may also require an apostille copy of the marriage certificate, this can be obtained after the ceremony once the couple makes an application at the Registrar General’s office in Nassau. The process takes seven (7) to ten (10) days.

the information provided by Bahamas Registrar General's Department