Good Afternoon, We are a structural engineering company based in Arkansas and licensed nationwide. Typically we are a second or third-tier subcontractor on construction projects. Last year, we began work on a handful of projects with a new client in Florida. The client is Florida based, as are all of the projects. At this time, we have multiple projects that are past due by more than six months. Our client has become unresponsive and unwilling to resolve this issue with us directly. We did not submit a notice to owner; this is the first time we have had remittance issues with a client in Florida and were unaware of this need for this notice. In researching this matter, I came across the following information Notice to Owner. "A lienor not in direct privity of contract with the owner, except a laborer, a professional lienor, or a subdivision improver, is required to serve (i.e., deliver pursuant to F.S. 713.18) the owner with a notice to owner at any time before the expiration of 45 days from the lienor's first work or delivery of materials at the site." Does this exemption pay to us as a "professional lienor"? My second question is in regards to the length of time we have to file a lien. The work done on these projects was structural analysis calculations. This work was done in our offices in Arkansas, with the end product being digital submittals and some printed calculation books and stamped drawings. The work we did on these projects primarily took place between may of 2019 and August of 2019 with some additional information provided on a project in early September of 2019. Since that time, we are have been attempting to communicate and work with our client to receive payment. Could you please clarify what the time frame for being able to file a lien is for our situation? For some of these projects, construction is complete as of the end of last year. For others, construction is ongoing or has finished in the past month. Does it matter where the project is at, or is the time frame to file a lien dependent on our work alone?