We do two contracts with a client. One for design and then another for construction. So should we wait to send the prelim notice until construction starts? Or is it ok to send once design contract starts? Considering that we can file a lien in CA against a client for non-payment of design services after a demand letter is sent after failure to pay 10 days out and before construction commences. I now have this question. Or does it not hurt to send the prelim early.