2012 - 2013 © Express Lien, Inc. dba Zlien. Zlien is a national mechanic lien and preliminary notice filing service, and also provides the LienPilot web-based lien compliance manager and deadline calculator. It is also the publisher of the web’s most extensive lien law resources and commentary. Zlien is not a law office and does not provide legal advice. CA LDA #352. Compliant with Arizona Legal Document Assistant laws as supervised by AZ Attorney Bar #029266.