Our company installs Structured Data cabling in banks and schools. In 2016 there was a project that was started and 2 1/2 years later the project was finished. The cabling was contracted to us by a company that was in business at that time, but when the project was completed the company we contracted through had been sold to a major company that is now saying they bought the business but not the debts they have outstanding. The company we contracted thru still has an accountant and a law firm I am assuming because of the situations we are faced with. Part of the project was bid with an E-Rate bond to the school in which we provided $20,000.00 in materials and labors and an additional $4500.00 that was not E-Rate. The company we contracted with failed to keep the government forms up to date so the E-Rate bond was cancelled and according to the company they have been trying to get it fixed so everyone can be paid. The school under that bond was only obligated to pay 15% of the final invoice and until ETCS can get the E-Rate fixed and approved they will not pay the 15% of the invoice. The school is a good customer but we need the $20000.00 so I am asking for advise. How do I put a lien on a company that doesn't exist? Should I send a certified letter to the school and ETCS stating that by a determined date, if we aren't paid we intend to repossess our equipment and cabling other than the amount that has been payed?