Weddingbee boards

Are you getting married in NYC proper?  All officiants who perform weddings within New York City MUST register with City Hall, and City Hall checks all of their legality to make sure that they can legally marry you.

You should be able to call City Hall with your officiant's name to make sure they are registered, but it's probably easier to ask your officiant for their registration number and then confirm that with the city.  If you meet them for an interview, you can also ask them in advance to bring their registration certificate. 

If you're not getting married in NYC proper, I think it depends on the state.  You can ask them for their legal documentation, and they should be able to provide you with their certification that states they are who they say they are. 

For example, I'm a Celebrant / wedding officiant in NJ and NYC - I can provide my NYC registration, but I also bring my certificates of ordination to meetings to share with couples (though I do mostly non-religious and non-denominational weddings, my ordainment with an organization is what legally allows me to officiate at weddings).

Good luck!!