I sent a prelim notice for the first invoice, which prompted immediate payment on that invoice, but now the second invoice is past due which was not included on the original notice because it had not been past due at the time the first notice was sent.
Yes you should Sent Monthly Prelim Notices Until you file the Lien, If you continue to have these issues with this Feel free to reach out to me @ 972-872-8783 My firm helps Contractors like yourself get paid on projects like these every day