8 CFR § 1003.13 - Definitions.
As used in this subpart:
Charging document means the written instrument which initiates a proceeding before an Immigration Judge. For proceedings initiated prior to April 1, 1997, these documents include an Order to Show Cause, a Notice to Applicant for Admission Detained for Hearing before Immigration Judge, and a Notice of Intention to Rescind and Request for Hearing by Alien. For proceedings initiated after April 1, 1997, these documents include a Notice to Appear, a Notice of Referral to Immigration Judge, and a Notice of Intention to Rescind and Request for Hearing by Alien.
Filing means the actual receipt of a document by the appropriate Immigration Court.
Service means physically presenting or mailing a document to the appropriate party or parties; except that an Order to Show Cause or Notice of Deportation Hearing shall be served in person to the alien, or by certified mail to the alien or the alien's attorney and a Notice to Appear or Notice of Removal Hearing shall be served to the alien in person, or if personal service is not practicable, shall be served by regular mail to the alien or the alien's attorney of record.