Signature Card Requirements: Legal Authority and Account Ownership

The signature card is treated as paperwork and functions as the governing document for the account. When a customer dies, a marriage ends, a business partner disputes a withdrawal, or a court asks who owned the funds, the signature card is the answer — and it is frequently wrong, incomplete, or missing.

What the Signature Card Does

It performs four distinct jobs, and conflating them is the source of most problems.

It is the contract. By signing, the customer agrees to the deposit agreement, the fee schedule, funds availability terms, and any arbitration or dispute provisions. This is why the card must reference the agreement and why the agreement in effect at signing matters.

It establishes ownership. Individual, joint with rights of survivorship, joint as tenants in common, payable on death, custodial, fiduciary, trust, or business. Ownership determines who owns the funds, what happens at death, and how deposit insurance is calculated.

It establishes authority to transact. Ownership and authority are not the same. A signer on a business account has authority without ownership. A minor may own an account they cannot transact on. Conflating these is the most common conceptual error in account opening.

It provides a specimen signature for verification — a function that has diminished as transactions moved to cards and channels, but still matters for items presented over the counter.

Ownership Designations

Individual. One owner, funds to the estate at death unless a payable-on-death designation exists.

Joint with rights of survivorship. On the death of one owner, the funds pass to the survivor outside probate. This is what most customers assume they are opening.

Joint as tenants in common. Each owner holds a share, and at death that share passes to the estate rather than to the co-owner. Rarely intended and occasionally correct — business partners, for instance.

Payable on death. A single or joint account with a named beneficiary who takes on the death of the owner or owners, outside probate, with no rights during the owner's lifetime.

Custodial accounts for minors. Established under the state's transfers-to-minors act, with a custodian who controls the account and a minor who owns the funds. The custodian's authority terminates when the minor reaches the statutory age, and the funds belong to the minor throughout — a distinction custodians frequently misunderstand.

Fiduciary accounts. Estate, guardianship, conservatorship, and representative payee accounts, each requiring documentation of appointment and each carrying limits on what the fiduciary may do.

Trust accounts. Governed by the trust instrument, requiring documentation of the trustee's authority — a certification of trust in most states rather than the full instrument.

The ownership designation should be an affirmative choice, explained and recorded. What produces litigation is a card where the customer checked a box nobody explained, and the family later disputes what was intended.

Authority on Business Accounts

Business account authority requires two documents working together.

The entity's authorization — a corporate resolution, LLC consent, partnership authorization, or equivalent — identifying who may open the account, who may transact, and what limits apply. This comes from the entity, not from the person in front of you.

The signature card recording the individuals so authorized.

Two failures recur. The resolution is never updated when officers change, so the person transacting has no current authority on file and the bank has no defense if a payment is later disputed. And the resolution's limits are recorded and not enforced — a resolution requiring two signatures over a threshold, with a system that never checks.

For sole proprietorships, the individual and the business are the same legal person, but the fictitious name or DBA registration should still be documented so the bank can accept items payable to the trade name.

Powers of Attorney

An agent under a power of attorney presents one of the more difficult account-opening judgments.

What to verify: that the document is valid on its face and properly executed under state law; that it grants authority over banking or financial matters specifically, since general language may not suffice in some states; whether it is durable, meaning it survives the principal's incapacity; whether it is currently effective, as a springing power requires the triggering event to have occurred; and whether it has been revoked.

Many states have a statutory form and provide protection to institutions accepting it, sometimes with a mechanism to request an agent's certification. Several states also impose penalties for unreasonable refusal to accept a valid power of attorney, so a blanket policy of declining them is not available.

The agent's authority terminates at the principal's death. An agent who continues transacting after death is acting without authority, and a bank that permits it has exposure to the estate.

Death of an Owner or Signer

• Individual account: funds to the estate, accessible to the personal representative on documentation of appointment, subject to any payable-on-death designation.
• Joint with survivorship: the survivor owns the funds. The account is generally retitled rather than closed.
• Payable on death: the beneficiary takes on presentation of a death certificate and identification.
• Business account: the entity survives the individual; the resolution determines who may now transact.
• Fiduciary account: depends on the capacity and the underlying appointment.
• Agent under power of attorney: authority ends immediately.

Deposits arriving after death — particularly federal benefit payments — carry their own reclamation rules, and paying them out to a survivor can leave the institution owing the funds back.

Maintenance Nobody Performs

Signature cards decay quietly, and the decay is only discovered when the card is needed.

• Cards for accounts opened decades ago, on forms referencing an agreement that no longer exists
• Business resolutions naming officers who left years ago
• Joint owners who divorced, with no change to the card
• Powers of attorney on file with no confirmation the principal is living or the document unrevoked
• Custodial accounts where the minor reached majority and nothing happened
• Cards that were never imaged, existing only in a branch filing cabinet

A periodic review — sampling cards for completeness, imaging status, and consistency with the system's ownership coding — is unglamorous and pays for itself the first time an account is disputed.

Structured coverage is available through Deposit Accounts and Services, the Certificate in Deposit Compliance, and our deposit compliance training.

The Conversation That Prevents the Dispute

Nearly every signature card dispute traces to a conversation that did not happen at account opening. Three questions, asked plainly, prevent most of them.

"If something happens to you, who should this money go to?" This surfaces the difference between joint survivorship, tenants in common, and payable on death in terms the customer can actually answer. A customer adding an adult child to an account "so they can help with bills" frequently intends convenience and creates survivorship — disinheriting their other children without knowing it. That single scenario produces more account litigation than any other.

"Does this person need to be able to take money out, or just see the account?" Access and ownership are different, and many customers want the former and receive the latter. Where the institution offers a convenience or agency arrangement rather than joint ownership, this is the moment to explain it.

"Who at the business needs to sign, and does anything require two signatures?" Asked at opening, this produces a resolution that matches how the business actually operates. Asked after a disputed withdrawal, it produces a lawsuit.

Staff should document that the options were explained and the customer chose — not to build a defense file, though it serves as one, but because the act of explaining is what causes the customer to choose deliberately. The card is the record of an intention, and an intention nobody articulated is what the family argues about later.

Electronic Signature Cards and Digital Onboarding

Account opening has largely moved to screens, and the signature card's functions did not disappear — they were redistributed across a digital flow where nobody owns them collectively.

The contract function now depends on the customer having been presented with the deposit agreement and having assented in a way the institution can evidence. Under the E-SIGN framework that means consumer consent to electronic records, disclosures delivered in a form the customer can retain, and a retained record of what version was presented and when. Institutions that can produce the click but not the document version have a weaker record than a paper card in a drawer.

The ownership designation is where digital flows are most often deficient. A paper card forces a choice among printed options with an employee available to explain them. A screen frequently defaults to individual ownership, offers joint as a checkbox, and explains nothing about survivorship versus tenants in common or what a payable-on-death designation does. The result is a large population of accounts whose titling reflects a default rather than an intention — and the dispute arrives years later with no conversation to point to.

Authority on business accounts rarely fits a self-service flow at all, which is why most institutions still require an in-person or assisted step for entity accounts. Where a digital path exists, the resolution and the individuals authorized still have to be captured and enforceable.

Specimen signatures largely vanish, which matters less than it once did but not nothing — items presented over the counter still get compared against something.

Two practical recommendations. Make the ownership choice an explicit screen with plain-language consequences rather than a checkbox, and record what was shown. And audit the digital flow against the paper card's four functions periodically, because screen order and field defaults get changed by developers who have no reason to know what the card was for.

One last framing worth giving new account staff. The signature card is the only document in the relationship that answers the question "whose money is this?" — and it answers it years later, to people who were not present, in circumstances where the customer cannot be asked. Every other record in the account can be reconstructed from transactions. Ownership cannot. That is why a card completed carefully in four extra minutes at opening is worth more than any amount of diligence afterward, and why the institutions with the fewest account disputes are simply the ones whose staff were taught that the card matters.

Frequently Asked Questions

What does a signature card actually establish?

Four things: the contract binding the customer to the deposit agreement and fee schedule; the ownership designation determining who owns the funds and what happens at death; the authority of individuals to transact, which is separate from ownership; and a specimen signature for verification. It is the governing document when ownership or authority is later disputed.

What is the difference between ownership and authority?

Ownership is whose money it is; authority is who may transact. A signer on a business account has authority without ownership. A minor with a custodial account has ownership without authority. Confusing the two is the most common conceptual error at account opening and the source of most later disputes.

What is the difference between joint with survivorship and tenants in common?

With rights of survivorship, the surviving owner takes the funds on the death of the other, outside probate. As tenants in common, each owner holds a share that passes to their estate rather than to the co-owner. Most customers assume survivorship; tenants in common is occasionally correct, such as between business partners.

What must a bank verify on a power of attorney?

That the document is valid and properly executed under state law, that it grants authority over financial or banking matters specifically, whether it is durable and survives incapacity, whether it is currently effective if it is a springing power, and whether it has been revoked. The agent's authority ends immediately at the principal's death.

What happens to an account when an owner dies?

It depends on the ownership designation. Individual accounts pass to the estate subject to any payable-on-death beneficiary; joint accounts with survivorship pass to the survivor; payable-on-death accounts pass to the named beneficiary; business accounts continue with authority determined by the entity's resolution. An agent's power of attorney authority terminates at death.

How often should signature cards be reviewed?

Periodically, sampling for completeness, imaging status, and consistency with the ownership coding in the core system. Cards decay quietly — outdated business resolutions, divorced joint owners, custodial accounts where the minor reached majority, and powers of attorney with no confirmation of validity — and the decay is typically discovered only when the card is needed.