Authorized Signatory Letter To Bank Template for the United States

When your organization needs to establish banking relationships or modify existing account authorities in the United States, an Authorized Signatory Letter To Bank serves as the formal record of who holds signature authority on the bank account. This document communicates to your bank which specific individuals have the legal authority to conduct transactions, sign checks, transfer funds, and make other financial decisions on behalf of your organization.

What is signature authority on a bank account?

Signature authority on a bank account is the legal right to operate that account: to deposit and withdraw funds, sign checks, approve transfers, and authorize payments in the organization's name. The bank recognizes a person as an authorized signatory only once they appear on the signature card and are supported by a document like this letter, usually backed by a board resolution or operating agreement. Signature authority is distinct from account ownership. An authorized signer can move money on the account without personally owning the funds, and the organization can add, limit, or revoke that authority at any time by filing an updated letter with the bank.

When do you need this document?

You'll require an Authorized Signatory Letter when opening new business accounts, adding or removing signatories from existing accounts, or when key personnel changes affect your banking operations. Banks typically request this document during account setup, when updating signature cards, or following corporate restructuring. If you're establishing a new business entity, changing company officers, or modifying banking privileges for existing team members, this letter becomes mandatory. Additionally, many banks require updated authorization letters annually or whenever there are significant changes in company leadership or operational structure.

What does the letter include?

A complete letter identifies the organization and account, names each authorized signer, and states exactly what each person may do. The core components usually are:

• The organization's legal name, address, and account number(s) the authority applies to.
• The full name, title, and role of each authorized signatory.
• The scope of authority for each person, including transaction types and dollar limits.
• Specimen signatures that match those held on the bank's signature card.
• Any joint or dual-signature requirement for transactions above a set threshold.
• The corporate resolution or operating agreement reference authorizing the appointments.
• The effective date and the signature of an officer with power to bind the organization.

A worked example

Suppose a construction firm opens an operating account and wants two directors able to sign, but with a control on large payments. The letter might grant Director A and Director B each individual signature authority up to $10,000 per transaction, and require both signatures jointly for any payment above $10,000. It would attach each director's specimen signature and reference the board resolution dated the week before. If Director B later leaves, the firm files a revised letter removing them, and the bank updates the signature card so Director B can no longer draw on the account.

Single versus joint signatories

You can give one person sole signature authority, or require two or more signatories to approve a transaction together. Joint requirements add a control for higher-value payments and reduce the risk of a single person moving funds unchecked. Many organizations set a dollar threshold: routine payments clear on one signature, larger ones need two. Spell out the threshold and the required combination in the letter so the bank can enforce it on every item presented against the account.

Key considerations when granting authority

The authorization statement must clearly define the scope of each signatory's authority, including transaction limits, permitted activities, and any restrictions. Include complete account details, specimen signatures that match the bank's records, and the corporate resolution authorizing each individual. Address succession planning and what happens if an authorized signer becomes unavailable or leaves. Because signature authority is a standing power over organizational money, keep the list current and revoke access promptly when roles change. If you also need a formal board approval to accompany this letter, our board resolution for appointment of an authorised signatory pairs with it, and you can review what counts as a valid authorized signature before you finalize the specimen signatures.

Legal requirements in United States

Under the Bank Secrecy Act and USA PATRIOT Act, banks must maintain current records of all authorized account signatories and verify their identities through enhanced due diligence procedures. Your letter must comply with Federal Reserve Board regulations regarding signature authority documentation and FDIC requirements for insured institutions. The document should include corporate registration numbers, tax identification numbers, and other identifying information required under federal banking regulations. Banks are required to verify that authorized signatories have legitimate authority under your organization's governing documents, such as articles of incorporation or operating agreements. Additionally, the E-SIGN Act allows for electronic signatures on banking documents, but your letter should specify whether electronic or physical signatures are preferred for ongoing transactions.