You should file a UCC-1 Financing Statement with the secretary of state’s office in the state where the debtor is incorporated or located. If the collateral is real property, then you should also file a UCC-1 with the county recorder’s office in the county where the debtor’s real property is located.
Secretaries of state have websites where you can file your UCC-1 and instructions on how to complete all forms. Individual counties may not have websites and require you to file by mail or in person.
While there is a national UCC-1 form, some jurisdictions may have their own specific form. Be sure to use the correct form.