California FTB Notice Subpoena – Letter to Third Party and Receipt (AUD 1586)

The AUD 1586 is a document the California Franchise Tax Board sends to third parties — such as banks, employers, landlords, accountants, or business partners — subpoenaing records related to a taxpayer’s financial activity. The ‘Letter to Third Party and Receipt’ format means the FTB is formally notifying the third party of the subpoena and providing a receipt for documents received. This is a legal document, not an informal request, and the third party is generally required to comply.

California Revenue and Taxation Code Section 19504 gives the FTB broad subpoena authority during audits or investigations. They can subpoena financial records, business records, correspondence, and other documents from third parties without the taxpayer’s consent. The taxpayer is typically notified that a third-party subpoena was issued — which is when you’d first hear about an AUD 1586 — but the FTB doesn’t need your permission to proceed.

Receiving notice that the FTB subpoenaed your bank or employer is a signal that the audit is serious and that the FTB believes you have income or assets they haven’t fully accounted for. The Reed Corporation advises clients to engage professional representation immediately when FTB third-party subpoenas are issued.

In most cases, no. The FTB’s administrative subpoena authority under California Revenue and Taxation Code Section 19504 is broad, and courts rarely intervene in FTB administrative subpoenas unless the subpoena is clearly improper — for example, if it seeks records that are protected by attorney-client privilege, or if it’s issued outside the FTB’s jurisdiction. Ordinary taxpayer financial records held at banks and other institutions typically don’t enjoy those protections.

However, there are procedural protections. The FTB is required to provide notice to the taxpayer before enforcing a subpoena in most cases, giving you a narrow window to object through the courts if you have legitimate grounds. That window is short — typically 15 to 20 days from notice — and the evidentiary standard for successfully quashing an FTB administrative subpoena is high. Most challenges fail unless there’s a clear privilege issue.

What you can do is get ahead of the bank records by understanding exactly what the FTB is looking for before they see it. Once we know a subpoena has been issued, we pull the same records the FTB will receive, analyze what they show, and build an explanation for any deposits or transactions that could otherwise look like unreported income. Preparation before the FTB reviews those records is far more valuable than trying to stop them from getting the records.

After the FTB receives the subpoenaed records, their audit team will review them for deposits and withdrawals that don’t reconcile with what you reported on your return. The FTB’s method is often an indirect audit technique called bank deposit analysis — they add up total bank deposits for the year and compare them to reported income. Any excess deposits the FTB can’t tie to a nontaxable source (transfers between accounts, loan proceeds, gifts, inheritances) get treated as unreported income.

The FTB will then typically issue a formal information document request (IDR) asking you to explain specific transactions — usually the ones that look like income but aren’t accounted for on your return. If you can document nontaxable sources for those deposits, the FTB adjusts their calculation so. If you can’t, or if you don’t respond, those deposits become the basis for an assessment.

We work through bank deposit analyses carefully and methodically. The first step is categorizing every deposit: payroll that’s already reported, transfers between your own accounts, loan proceeds, insurance payments, gifts, and true unreported income if any exists. That categorization is what you present to the FTB. A clear, organized account-by-account analysis almost always reduces the FTB’s initial estimated adjustment significantly.

California law generally requires the FTB to provide the taxpayer with notice before a third-party subpoena is enforced, giving you a short window to object if you have grounds. California Revenue and Taxation Code Section 19504 specifies the subpoena procedures, and the FTB’s audit manual includes notice requirements. The AUD 1586 ‘Letter to Third Party and Receipt’ is part of that process — you’d receive a notice that a subpoena was issued to a specific third party.

The notice requirement exists to protect taxpayer rights, but it’s not a veto. You’re notified so you can object through the courts if you have legitimate grounds — not so you can simply refuse and stop the process. In practice, most FTB subpoenas to banks and employers proceed without challenge because the grounds for objection are narrow. The notice period is usually 15 to 20 days.

If you receive notice that the FTB has subpoenaed a third party and you believe the subpoena is improper, overly broad, or involves privileged materials, contact a tax professional immediately. That 15-to-20-day window is your only opportunity to seek a court order before the records are produced. Missing that window means the records go to the FTB and you’re responding to what they find rather than controlling the information flow.

California Revenue and Taxation Code Section 19504 gives the FTB very broad subpoena authority. During an audit, they can subpoena bank statements, canceled checks, wire transfer records, brokerage accounts, loan documents, real estate transaction records, payroll records from employers, business financial records from business partners or clients, accounting records from your CPA, and correspondence from attorneys (subject to privilege claims). The scope is limited primarily by relevance to the tax years under audit.

One category many people overlook: the FTB can subpoena records from out-of-state banks and financial institutions, not just California institutions. Under California’s administrative processes and interstate cooperation agreements, the FTB regularly subpoenas records from national banks and brokerage firms regardless of where the institution is headquartered. If you had income flowing through out-of-state accounts, those records are accessible to the FTB.

The FTB’s subpoena authority doesn’t extend to records protected by attorney-client privilege or documents that are genuinely privileged under California law. Work product doctrine and certain accountant-client communications may also be protectable, though the California accountant-client privilege under Evidence Code Section 1040 is narrower than the attorney-client privilege. If you’re concerned about privileged materials being captured in an FTB subpoena, that’s a discussion to have with a tax attorney immediately.