Great question — and worth separating the ceremony from the legal registration, because they're two different things.
As a general guide, most NRI couples complete their legal marriage registration in India. Two common routes exist: registering under the Special Marriage Act (a civil marriage, which typically involves a notice period with the local marriage registrar and a short waiting window before solemnisation), or registering a religiously solemnised marriage under the relevant marriage act. Either way you'll usually need proof of identity and address, date-of-birth documents, passport and visa/OCI details, passport-size photographs, and witnesses present at registration. Timelines and exact paperwork vary by state and by registrar.
Because rules differ across states — and because your home country may have its own recognition or attestation steps — please confirm the specifics with your local marriage registrar and, ideally, a lawyer before booking flights. We can't give country-specific legal advice.
What we can do is sequence the formalities into your trip so the paperwork doesn't collide with your functions — and point you to the right local professionals to verify everything.
