Contrary to some popular legends, no state authorizes ship captains to perform marriages. Most states require one or two witnesses to sign the marriage certificate. The person who performs the marriage ceremony has a duty to send a copy of the marriage certificate to the county or state agency that records marriage certificates. Failure to send the marriage certificate to the appropriate agency does not necessarily nullify the marriage, but it may make proof of the marriage more difficult. States generally do not require that certain words be used in a marriage ceremony, but the person or persons conducting the ceremony should indicate that the man and woman agree to be married.
Most states consider a couple to be married when the ceremony ends.
Lack of subsequent sexual relations does not automatically affect the validity of the marriage, although in some states non-consummation could be a basis for having the marriage annulled. Everything you need for court related issues. The Intelligent Alternative to Court. Excellent legal service at your convenience. For less than you'd expect.