Just a heads-up that the Van Nuys Post Office, formerly located in the Van Nuys Civic Center at 6200 Van Nuys Blvd is now closed and the new branch has opened at 6531 Van Nuys Blvd at the intersection of Van Nuys Blvd and Haynes Street.
Be aware that the counter area is significantly smaller than the old location, although it was nearly empty of patrons when I visited today.