Legal documents are full of formalities that look archaic but serve real purposes. Duly signed, duly executed, and duly authorized are three of the most common—appearing at the signature blocks and authorization clauses of virtually every formal business agreement. Here’s what each means and why the word “duly” does important legal work.
What Does “Duly” Mean in Law?
In legal usage, duly means “in the proper manner” or “in accordance with all applicable legal requirements.” When a document is “duly signed,” it means the signature was made by the right person, with the right authority, and with all formalities properly observed. The word “duly” certifies compliance with applicable requirements—it’s not mere decoration.
Duly Executed
Duly executed means a document has been signed and completed in accordance with all legal requirements for its type—by the right parties, with the right authority, and with any required formalities (notarization, witnesses, corporate authorization) properly observed.
Common usage:
“This Agreement shall become effective upon duly executed counterparts being exchanged by all parties.”
Why it matters: a contract that is not “duly executed” may be unenforceable. An agreement signed by someone without authority to bind the company, or a deed that lacks required witnesses, is not duly executed and may create no legal obligations.
Duly Authorized
Duly authorized means that the person acting on behalf of an entity has been properly empowered to take that action—through board resolutions, corporate bylaws, the operating agreement, or delegated authority from someone who had proper authority.
Standard signature block language:
“IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written above by their respective duly authorized representatives.”
When a company representative signs a contract, this language is a representation that they had the authority to bind the company. If they didn’t—if the board hadn’t approved the transaction, or if signing authority required two officers but only one signed—the “duly authorized” representation is false, and the contract may not bind the company.
Duly Signed
Duly signed has the narrowest meaning of the three: the document has been signed, and that signature was made properly—by the right person, with the right authority, in the required format. “Duly signed” is most commonly used in the context of checks, promissory notes, instruments, and official documents that require signature as a condition of validity.
Why These Terms Matter: Corporate Authorization
For companies, “duly authorized” requires proper corporate action before the signature. This means:
| Entity Type | Authorization Method |
|---|---|
| Corporation | Board of directors resolution; officer authority under bylaws |
| LLC | Manager or member authority under operating agreement; member vote for major decisions |
| Partnership | General partner authority; partnership agreement provisions |
| Individual | Personal capacity (no corporate authorization needed); or power of attorney |
A counterparty who is concerned about authorization will often request a corporate secretary certificate or officer’s certificate confirming that the signing officer was properly authorized. For major transactions (acquisitions, significant financing, real estate), this is standard practice.
Practical Implications for Startups
- Keep your authorization documents current: Board resolutions authorizing officers to sign contracts should be accurate and up-to-date. When officer roles change, update your signing authority documentation.
- Understand your operating agreement’s signing authority provisions: Many operating agreements require member consent for contracts above a certain dollar threshold. Signing a major contract without required member approval means it wasn’t “duly authorized.”
- Electronic signatures: Under the Illinois Electronic Commerce Security Act (5 ILCS 175) and federal ESIGN Act, electronic signatures are legally equivalent to handwritten signatures for most contracts. An e-signature can be a “duly executed” signature if all requirements are met.
FAQ: Duly Signed and Duly Authorized
What happens if a contract wasn’t duly authorized?
The company may argue the contract is not binding on it. However, if the counterparty reasonably relied on apparent authority (reasonable belief that the signer had authority), Illinois courts may hold the company bound under an apparent authority theory—even if actual authority was lacking.
Can a CEO sign any contract on behalf of the company?
CEOs typically have broad authority to bind their companies for ordinary business transactions under both actual and apparent authority. But major transactions—acquisitions, real estate purchases, significant financings—typically require board approval even for a CEO. Check your bylaws or operating agreement.
Fitter Law helps Illinois startups structure proper corporate authorization, prepare board resolutions, and review signing authority provisions in operating agreements and bylaws. Learn about our corporate governance services.