Hey Yassy, You don't have to have them notarized by a lawyer, just any notary. I am not sure of the cost because I just had someone in my office at work notarize them for me. It should not be much for that at all! The documents that they need are notarized copies of you and the grooms birth certificates, passports, and drivers license. If either person needs a name change form if they were ever adopted or married previously, they would need that one too.