A Bank Confirmation Letter is a formal document issued by a financial institution or prepared by an account holder to verify and confirm specific details of a banking relationship. In the context of financial auditing, bank confirmations are governed by Statement on Auditing Standards (SAS) No. 67, issued by the American Institute of Certified Public Accountants (AICPA), which establishes standards for the confirmation process used by auditors to verify account balances and other banking information.

Bank confirmation letters serve multiple purposes in commercial and legal practice. For auditors, the AICPA Standard Confirmation Form is the primary tool for verifying a client's bank balances, outstanding loans, contingent liabilities, and other banking arrangements as part of an external audit. Under Generally Accepted Auditing Standards (GAAS), external auditors are required to obtain independent confirmation of material bank balances as part of the audit evidence gathering process.

Beyond auditing, bank confirmation letters are widely used in commercial transactions, visa applications, rental applications, and business qualification processes. Immigration authorities such as USCIS may require bank confirmation letters as evidence of financial support for visa petitions. Commercial landlords request them to verify a prospective tenant's financial stability. Government agencies may require them for contractor qualification or licensing applications. The letters typically confirm account existence, account type, current balance, account standing, and the duration of the banking relationship.

An external auditor conducting a year-end audit needs independent confirmation of a company's bank account balances, outstanding loans, and contingent liabilities from each financial institution where the company holds accounts. A business is applying for a commercial lease and the landlord requires verification of the company's financial capacity through a bank letter confirming account balances.

An individual is applying for a visa or immigration benefit and needs to demonstrate financial resources by providing a bank letter confirming account balances and banking history. A company is bidding on a government contract and must demonstrate financial capability by providing bank reference letters as part of the pre-qualification process.

A business owner is seeking a commercial loan and the new lender requires confirmation of existing banking relationships and account standings from the applicant's current banks. A party to a legal proceeding needs to verify or prove the existence and balance of bank accounts as part of discovery, asset disclosure, or settlement negotiations.

An investor or business partner requires verification of a company's bank balances as part of due diligence before making an investment or entering into a business arrangement.

The letter must identify the financial institution by full legal name, address, and routing number or SWIFT code. The bank officer or authorized signatory who issues or signs the letter must be identified by name, title, and contact information to allow verification.

The account holder's information must include the full legal name (individual or entity), address, and relationship to the bank. For business accounts, the entity's tax identification number or EIN may be included. The letter should specify whether the account holder is a sole owner, joint owner, or authorized signatory.

Account details should include the account number (which may be partially masked for security), account type (checking, savings, money market, certificate of deposit, line of credit), the date the account was opened, and the current balance or average balance as of a specified date. For audit purposes, the AICPA Standard Confirmation Form requests specific balance information as of the audit date.

For loan confirmations, the letter should disclose the loan type, original principal amount, current outstanding balance, interest rate, maturity date, collateral pledged, and whether the account is in good standing or default. Contingent liabilities such as letters of credit, guarantees, and unused credit lines should also be disclosed.

The letter must include the date of issuance and a statement that the information is accurate as of that date. A disclaimer noting that the letter is provided for informational purposes only and does not constitute a guarantee or commitment by the bank is standard. The letter should be on the bank's official letterhead with an authorized signature to ensure authenticity.

For audit confirmations, the letter must comply with AICPA confirmation standards and should be sent directly from the bank to the auditor to maintain independence. The auditor's name and firm address should be specified as the recipient.