Since very few experiences from Philippine nationals are posted here, I decided to post mine.
All cases are unique so this might not apply to you.
The No Objection Statement (NOS) for Philippine nationals is issued by the Commission for Filipinos Overseas (CFO). All NOS supporting documents issued in the US for submission to the CFO must be notarized and authenticated by the county, state and finally by a Philippine embassy or consulate in the US. Check the CFO and Philippine embassy websites for the required documents and fees.
Okay, here's the complete time line of my J1 waiver experience:
July 2008 - Started collecting all the documents needed for the NOS application. All documents were notarized with all the signatories signing the documents in front of the notary public. The notarized documents were authenticated first by the Clerk of Court of the county where the notary public was registered. Then, all the authenticated documents were further authenticated by the Secretary of State. It was a tiring and expensive ordeal!
August 2008- In the second week of this month, all the notarized and double authenticated documents were sent to the Philippine embassy. It only took five working days for the documents to be authenticated and sent back to me by the Philippine embassy. Not bad! . In the third week of this month, I sent all the documents to the CFO. Simultaneously, except for the NOS, all the other documents were sent to the DOS.
September 2008 - DOS received the documents. CFO issued my NOS.
October 2008 - DOS received my NOS.
December 2008 - Received the favorable recommendation by mail.
January 2009 - Received the formal waiver of the 2-year residency requirement from the USCIS. YAY!