Here.. Check this thread for more info..
Its a new policy from USEM.. basically they want you to pay this at least 2 weeks before the Interview..
If not.. There will be a delay for the Visa Issuance which can take weeks..
Docs Verification is for your NSO docs... USEM needs to verify them..
Applicants whose visa eligibility is dependent upon their marital status (i.e. K-1, K-3, CR-1, IR-1, F-1 and F2-B categories) will normally need to have their documents verified through the National Statistics Office (NSO) before the U.S. Embassy in Manila can issue the visa. Those with a delayed birth or death certificate or only local civil registrar copies of such documents may need to have their documents verified.
In order to avoid unnecessary delay in the visa issuance process, the U.S. Embassy in Manila strongly encourages applicants in the categories mentioned above to pay the document verification fee prior to their immigrant visa interview. Payment can be made through any Metrobank location. The cost of the document verification is P650 per applicant. For specific instructions on how to pay the document verification fee, please click
here. If you are unable to pay for the document verification before your immigrant visa interview, you may be asked to pay the fee on the day of your interview. Please note that if you pay on the day of your interview, there will be a delay of one to two weeks in the processing of your application.