Good question. There are a number of states where a written contract is expressly required
in order to preserve your lien rights. For a state-by-state breakdown, you can read: Can You File a Lien Without a Written Contract?
For Florida specifically, the definitions section of the lien statute, §713.01 states that a contract is, "an agreement for improving real property, written or unwritten, express or implied, and includes extras or change orders
." Therefore, a written agreement is not required to preserve lien rights in Florida. However, proceeding to work without a written contract is a risky proposition. We always stress the importance of getting everything
in writing. If operating without a written contract, be sure to organize and document everything; including all correspondence, receipts, and any daily or progress reports. For additional resources check out: (1) Time and Materials Contracts: Pros & Cons
, and (2) Florida Mechanics Lien & Notice OVerview page