Hi, We design, order and ship kitchen bathroom and closet cabinetry, as well as recommend and oversee the installation. I was told we have 20 days from the start of the job to file a prelim notice. How is the start of the job determined? From when we order products? Or when they are delivered to the jobsite? We have customers pay 50% at the time we order their products, it is then about three months until they are delivered from Italy to the jobsite at which point we collect another 30% and when the installation is complete we collect the remaining 20%. We would be considered material suppliers but I guess also technically sub-contractors because we hire contractor c's for the installation. I'm not sure if I should choose material supplier or sub-contractor when filling out prelim notices?