A bank confirmation letter is a document your bank sends directly to a third party, usually an auditor or a lender, verifying your account balances, loans, and other financial details with that institution as of a specific date. Because it travels straight from the bank to the requester without passing through your hands, it carries far more evidentiary weight than a statement you print yourself. You get one by signing an authorization that lets the bank release the information, and the bank handles the rest.
When You Would Need One
Four situations drive almost every request.
A financial statement audit is the most common. External auditors need independent proof that the cash, loans, and other balances a company reports on its books actually exist at the bank.1PCAOB. AS 2310 – The Auditors Use of Confirmation If your company is being audited, your auditor will send confirmation requests to every bank you deal with.
Lenders ask for one before underwriting a new loan. They want to see how much cash you actually hold and whether you already carry debt elsewhere, both of which drive the credit decision.
In mergers and acquisitions, confirmation letters are a standard due diligence item. The buyer uses them to verify the seller’s reported assets and liabilities and to surface anything hidden, such as undisclosed guarantees or unrecorded credit lines, before closing.
Individuals occasionally need a version of this letter for immigration purposes. Visa applicants or their sponsors may be asked to produce a bank-issued letter showing balances and account history to demonstrate they can support themselves or a family member. The format differs from an audit confirmation, but the principle is the same: the bank vouches for the information, not you.
What the Letter Actually Contains
The letter is a verified snapshot of your relationship with the bank on a single date, often called the “as of” date. It covers more than a balance.
For every deposit account you hold, including checking, savings, and money market, the letter lists the exact balance and the interest rate.2AICPA & CIMA. Standard Form to Confirm Account Balance Information with Financial Institutions These are the figures the auditor or lender compares against your books.
For every loan, the letter lists the outstanding balance, interest rate, maturity date, and the date through which interest has been paid. If the loan is secured, the letter identifies the collateral, such as real estate or equipment, so the recipient understands the priority of the bank’s claim.
The letter also captures obligations that don’t appear as traditional debt on your books. Standby letters of credit, third-party guarantees you’ve provided, and similar contingent arrangements all show up. For an acquirer or a lender, these are often the items that matter most.
A bank statement is not a substitute. A statement is a record of transactions over a period that you can download yourself, which means it has been in your hands. A confirmation letter is verified by the bank and sent directly to the requester. That independence is the whole point, and it is why no bank will send a completed confirmation letter back to you.
How to Request a Bank Confirmation Letter
Most audit confirmations use a standard form jointly approved by the American Institute of Certified Public Accountants, the American Bankers Association, and the Bank Administration Institute. The AICPA publishes it as a free fillable PDF.3AICPA. Standard Form to Confirm Account Balance Information with Financial Institutions
The form has two main sections. The first captures deposit account details: account name, account number, interest rate, and balance. The second captures loan details: account number or description, balance, due date, interest rate, the date through which interest is paid, and a description of any collateral. A separate section lets the bank flag exceptions and comments.2AICPA & CIMA. Standard Form to Confirm Account Balance Information with Financial Institutions
To fill it out, you need:
- The client’s full legal name exactly as it appears in the bank’s records
- The specific “as of” date for which balances should be confirmed
- Every relevant account number across deposit and loan accounts
- Full contact information for the third party who will receive the completed letter
An incomplete or improperly authorized form will stall the process. The authorization itself matters as much as the account details. No bank will release information to a third party without your explicit, written consent, because the Gramm-Leach-Bliley Act restricts financial institutions from disclosing nonpublic personal information to nonaffiliated third parties, with an exception when the consumer gives consent or directs the disclosure.4Federal Trade Commission. How To Comply with the Privacy of Consumer Financial Information Rule of the Gramm-Leach-Bliley Act5FDIC. Gramm-Leach-Bliley Act – Privacy of Consumer Financial Information The standard form has a signature line for the customer’s authorized signatory, and the bank will cross-reference that signature against its own records before processing the request.
For business accounts, the signer must have actual authority over the account. The authorization should cover every account at the institution, including those with zero or negative balances. Leaving one out defeats the purpose.
How It Gets Delivered, and How Long It Takes
Paper confirmations have largely been replaced by electronic platforms. The dominant service in the United States is Confirmation.com, now part of Thomson Reuters, which connects auditors directly with thousands of validated financial institutions. For in-network banks, the average turnaround is about 48 hours.6Confirmation.com. Bank Confirmations Out-of-network and paper-based requests take considerably longer, depending on the complexity of your relationship with the bank and the institution’s current volume.
Whether the letter travels electronically or on paper, it goes straight from the bank to the auditor or lender. You never touch the completed document. That direct delivery is what preserves the independence of the evidence.1PCAOB. AS 2310 – The Auditors Use of Confirmation
Banks charge processing fees that vary by institution. Some bundle the cost into the commercial relationship; others charge a flat fee per confirmation. Electronic platforms add their own service fees. The amounts are modest per letter, but they add up for a company with accounts at multiple institutions, so it’s worth building them into the audit budget early.
What Happens If the Numbers Don’t Match
A mismatch between the bank’s confirmation and the client’s books doesn’t automatically mean someone made a mistake. Timing differences are the most common explanation: a check written before the “as of” date that hasn’t cleared yet, or a deposit in transit that the bank hasn’t credited. The auditor reconciles these and decides whether they are routine or signs of a real error.
When the gap can’t be explained by timing, the auditor usually goes back to the bank to verify the confirmation itself. In practice, the bank’s letter is often what needs correcting, not the client’s records. If the bank confirms its letter is accurate, the investigation shifts to the client’s accounting.
Silence from the bank is not agreement on a positive confirmation. If the bank doesn’t respond, the auditor has to perform alternative procedures, such as examining subsequent bank statements, reviewing the bank reconciliation, or inspecting other supporting documents to get the same assurance.
Positive and Negative Confirmations
You may hear your auditor refer to the type of confirmation being sent. A positive confirmation asks the bank to respond no matter what, whether or not it agrees with the balances listed. This is the standard choice for large accounts, suspected errors, or weak internal controls.1PCAOB. AS 2310 – The Auditors Use of Confirmation A negative confirmation asks the bank to reply only if it disagrees, and the auditor treats silence as agreement. Negative confirmations work only when controls are strong and the accounts are numerous and individually small. When in doubt, auditors default to positive, because silence from a negative request may just mean the bank ignored it.