What Is a Proxy Account? Types, Powers, and Limits

A proxy account is any financial account where someone other than the owner has legal authority to manage the money in it. It isn’t a specific product sold by banks; it’s an umbrella term for arrangements where one person (the owner) grants another person (an agent, custodian, trustee, guardian, or representative payee) the power to handle deposits, withdrawals, investments, and bill payments on the owner’s behalf. The manager runs the account. The owner keeps the money.

How the Arrangement Works

Every proxy setup has two roles. The account owner keeps full legal ownership of the funds and remains the person who benefits from them. The manager gets limited authority to act for the owner, and that authority comes from a legal document: a power of attorney, a trust agreement, a court order, or a federal agency appointment.

The paperwork alone doesn’t make the arrangement live. A financial institution has to accept the governing document first. You could have a valid power of attorney sitting in a drawer for years, but until the bank reviews it and links the agent to the account, the agent cannot transact. That acceptance is what turns an ordinary account into a functioning proxy arrangement and protects the bank from liability when the agent later moves money.

This is different from a joint account, and the difference matters most at death. Joint account holders are co-owners with equal rights to the funds, and a surviving joint owner typically keeps the money through a right of survivorship. A proxy manager has no ownership interest at all. When the account owner dies, the money flows into the owner’s estate rather than to the person who was managing it.

Common Types of Proxy Accounts

The legal framework behind the arrangement decides the manager’s powers, how long the authority lasts, and what standard of care applies.

Power of Attorney Accounts

The most common proxy arrangement for adults. The owner signs a power of attorney naming someone as their agent for financial matters. A “durable” power of attorney stays effective even if the owner later loses mental capacity, which is why estate planners almost universally recommend the durable version.

An immediate durable power of attorney takes effect the moment it’s signed. A “springing” power of attorney only activates when a specific condition is met, usually the owner’s incapacity. The springing version sounds safer because it limits the agent’s authority to emergencies, but proving that the triggering condition has occurred can require a doctor’s certification or even a court order, which delays access at exactly the moment urgency matters most. Most financial institutions find immediate durable powers of attorney easier to work with.

The bank will want the original or a certified copy of the document. Its compliance team will review it for proper notarization, witness signatures, and whether the scope of authority clearly covers the transactions the agent wants to make.p>

Custodial Accounts for Minors

Accounts set up under the Uniform Gifts to Minors Act (UGMA) or the Uniform Transfers to Minors Act (UTMA) are proxy arrangements for children. The minor legally owns the assets, but a custodian manages the account until the child reaches a specified age, usually 18 or 21 depending on the state.¹ Transfers into these accounts are irrevocable. Once money goes in, it belongs to the child. When the child hits the statutory age, the custodian’s authority ends and the account must be retitled in the child’s name alone.

Trust and Guardianship Accounts

When a court appoints a guardian or conservator to manage someone’s finances, or when a trust names a trustee, the resulting account carries the highest standard of care. A court-appointed guardian must present current letters of guardianship or conservatorship before the bank grants access.²

For a trust account, the trustee’s authority comes from the trust document. Rather than handing over the full trust, which contains private information about beneficiaries, the trustee can provide a certification of trust. This shorter document confirms the trust exists, identifies the current trustee, and lists the trustee’s powers. Financial institutions can rely on a valid certification of trust without demanding the full agreement, and most states penalize institutions that unreasonably insist on seeing everything.

Representative Payee Accounts

When a Social Security beneficiary can’t manage benefits on their own, the Social Security Administration can appoint a representative payee. This is a federally regulated proxy arrangement with strict rules. The payee must keep the beneficiary’s Social Security funds completely separate from personal money and title the account to reflect the beneficiary’s ownership, typically formatted as “[Beneficiary Name] by [Payee Name], Representative Payee.”³ Joint accounts are not permitted.

The payee must spend funds on the beneficiary’s basic needs first (food, housing, utilities, clothing, and medical care not covered by insurance) and save any surplus in an interest-bearing account for the beneficiary’s future needs. The SSA requires most payees to file an annual accounting report.³ Becoming a payee requires completing Form SSA-11, usually through a face-to-face interview at a Social Security office.⁴

Convenience Accounts

Some states authorize convenience accounts, which function like a stripped-down proxy arrangement. The owner names someone as an authorized signer who can deposit and withdraw, but the signer has no ownership interest and no survivorship rights. When the owner dies, the money goes to the estate. Convenience accounts suit situations where an aging parent simply needs someone to handle errands at the bank, and they’re easier to set up than a formal power of attorney, though they carry less protection.

A Note on Brokerage “Trusted Contacts”

Naming a trusted contact person on a brokerage account is not a proxy arrangement. FINRA requires brokerage firms to ask for a trusted contact, but that person receives no authority over your account. The firm can only reach out to them in limited situations, such as concerns about account activity or an inability to reach you. To give someone actual authority to trade on your behalf, the firm needs a power of attorney on file or a discretionary investment advisory agreement.⁵

What the Manager Can and Can’t Do

Anyone managing someone else’s money in a proxy arrangement is a fiduciary. The manager must act only in the owner’s best interest, handle the assets carefully, keep the owner’s money separate from their own, and keep thorough records. Breaking these duties can lead to removal, a civil lawsuit for repayment, or criminal prosecution.⁶

No Self-Dealing

The manager cannot borrow, loan, or give the owner’s money to themselves or others. They cannot pay themselves for their time unless the governing document or state law specifically allows it, and even then the fee must be reasonable.⁶ Mixing the owner’s funds with the manager’s own accounts is a violation in every type of proxy arrangement. This is where most fiduciary disputes start, often because the line between “managing” and “borrowing” feels blurry to a family member handling a parent’s money.

Limits on Gifting

Unless the governing document explicitly grants gifting authority, the manager generally cannot make gifts from the owner’s assets. Under the Uniform Power of Attorney Act, adopted in most states, even when gifting power is granted, the agent’s authority is limited by default to gifts that don’t exceed the annual federal gift tax exclusion, which is $19,000 per recipient for 2026.⁷ The manager must also weigh the owner’s financial obligations, maintenance needs, and prior gifting history before approving any transfer.

Prudent Investing

The Uniform Prudent Investor Act, adopted in nearly every state, requires a fiduciary to invest as a prudent investor would, considering the purposes and circumstances of the account, and to exercise reasonable care, skill, and caution. The focus should be on preserving capital and generating reasonable income, not chasing speculative returns. A manager with professional investment expertise is held to a higher standard and is expected to use that expertise.

Records

Detailed records are not optional. The manager must track every dollar in and out, keep receipts even for small expenses, and be ready to produce a formal accounting on request.⁶ Checks and documents should be signed to show the agent’s role (“Jane Smith, as agent for John Smith”) rather than simply signing the owner’s name. Poor recordkeeping is the fastest way to attract suspicion from other relatives or a court reviewing the arrangement.

When a Bank Rejects the Documents

Banks reject powers of attorney more often than people expect. Common reasons: a document that appears altered or incomplete, missing notarization or witness signatures, authority language that doesn’t clearly cover the requested transaction, or a document from another state that uses unfamiliar formatting. Banks will also reject a power of attorney if they suspect it has been revoked or see red flags suggesting the agent may be exploiting the owner.

One reason for rejection is specifically prohibited in states that have adopted the Uniform Power of Attorney Act: a bank cannot refuse a valid power of attorney solely because it isn’t on the bank’s own proprietary form. Citing the relevant state statute to the compliance department usually resolves that issue.

When you’re turned away, ask for a written explanation. Many rejections come down to fixable issues, such as providing a photocopy when the bank requires a certified original, or presenting a general grant of authority when the bank needs specific language for real estate transactions or large wire transfers. An estate planning attorney can often clear the problem with a supplemental document or a direct call to the bank’s legal department.

How Proxy Authority Ends

Proxy authority is always temporary. It ends at the owner’s death, on revocation by the owner, on the agent’s death or incapacity, when the arrangement’s purpose is complete, or, for custodial accounts, when the child reaches the age of majority.⁸

Revocation by the Owner

An account owner who still has mental capacity can revoke a power of attorney at any time. The step people often skip is making sure everyone who matters knows. The agent must receive actual notice, and the financial institution must be notified too. Anyone who relies on a revoked power of attorney without knowing it was revoked is generally protected from liability, which means a former agent could continue transacting if the bank was never told.⁸ Put the revocation in writing, deliver it to the agent and every institution holding the original on file, and keep proof of delivery.

Death of the Owner

A power of attorney terminates the moment the owner dies.⁸ Once the bank learns of the death, it will freeze the account to prevent further transactions by the former agent. The assets become part of the estate and pass under the will or, if there’s no will, under the state’s intestacy laws. Accessing those funds requires probate documentation such as letters testamentary or, for smaller estates, a small estate affidavit. State thresholds for the simplified small estate process vary widely, from roughly $25,000 to over $200,000.

A practical trap: an agent who makes transactions after the owner’s death, even unknowingly, can face personal liability. If you serve as someone’s agent, confirm their status before transacting whenever there’s reason for concern.

Custodial Account Transitions

UGMA and UTMA accounts end when the child reaches the age specified by state law, typically 18 or 21.¹ The custodian must then transfer all assets into a new account titled solely in the former minor’s name. The financial institution handles the transition based on the birth date in its records.

Final Accounting

Whatever ends the arrangement, the outgoing manager should prepare a final accounting covering the entire period of authority. That report details every receipt, disbursement, investment gain or loss, and remaining balance, and it goes to the owner, the successor trustee, or the executor of the estate. Skipping it looks suspicious and can expose the former manager to claims from beneficiaries or heirs who want to know where the money went.

1
HelpWithMyBank.gov. What Is a Uniform Gifts to Minors Act (UGMA) or Uniform Transfers to Minors Act (UTMA) Account
2
Consumer Financial Protection Bureau. Managing Someone Elses Money – Help for Court-Appointed Guardians of Property and Conservators
3
Social Security Administration. A Guide for Representative Payees
4
Social Security Administration. GN 00502.115 – The SSA-11-BK, Request to Be Selected as Payee
5
FINRA. Brokerage Accounts
6
Consumer Financial Protection Bureau. Help for Agents Under a Power of Attorney
7
Internal Revenue Service. Whats New – Estate and Gift Tax
8
Administration for Community Living. Power of Attorney Revocations 101