We have a project in Arizona that has been billed in full, less retention. We are looking to file a lien on the job in order to protect our rights to obtain that retention payment. What is the procedure to follow in order to file that claim and the requirements behind it? From my understanding, an AZ claim (in general) should be filed within 60 days of the Notice of Completion or 120 after completion of the entire project. Does that hold to retention only and does retention need to actually be billed?