Bring the following documents:
Valid passport
Printed Appointment Confirmation Letter (SAMPLE HERE)
Printed DS-160 Online Non-Immigrant Visa Application Confirmation Page (SAMPLE HERE)
Visa fee receipt
Original birth certificate
Original Certificate of No Marriage Record (CENOMAR) - Philippines
Original Police Clearance (NBI Clearance - Philippines)
Original Police Clearance from other countries for those who worked or lived in other countries for more than six (6) months
Evidences of genuine relationship - pictures together, chat/call/e-mail logs, plane tickets, boarding passes, hotel reservations of visits or vacations
Proof of termination of prior marriage (if any) - divorce decree, annulment document, death certificate
Completely filled out Form I-134, Affidavit of Support by petitioner and supporting documents: most recent income tax return, tax transcript, W2 or any proof of income
Three (3) 2"x2" colored photos with white background
Completed medical exam results
Tips on Interview:
Dress appropriately. You can wear business casual attire or even a nice pair of jeans with a collared shirt. Dress comfortably because you will wait for hours at the US Embassy. Also bring a light jacket or sweater because it is cold inside the embassy.
Arrive on time.
Be yourself. The interview will be mostly about you and your petitioner.
Do not bring any type of electronics in the US Embassy. Leave phones in your car or at home. Even flash drives are being confiscated inside when you go through the metal detector.