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

A proxy account is any financial account where the owner has given someone else legal authority to manage the money on their behalf. It is not a specific product sold under that name. It is an umbrella term for arrangements built on documents like a power of attorney, a trust, a court appointment, or a federal agency designation, all of which share the same core feature: the person running the account does not own the assets in it.

These arrangements appear constantly in estate planning, elder care, and managing money for minors. The owner keeps every legal right to the funds. The manager gets a defined slice of authority to act, and nothing more.

The Two Roles Behind Every Proxy Arrangement

Every proxy setup has an account owner and a manager. The owner keeps full legal ownership and remains the person who benefits from the money. The manager, who may be called an agent, custodian, trustee, or representative payee depending on the legal structure, receives limited authority to act for the owner. That authority always traces back to a written instrument: a power of attorney, a trust agreement, a court order, or an appointment letter from a federal agency.

The document alone is not enough. The arrangement only becomes operational once the financial institution accepts the paperwork and links the manager to the account. A valid power of attorney sitting in a drawer gives the agent no ability to transact until the bank has reviewed it. Institutional acceptance is what turns a standard account into a working proxy arrangement and shields the bank from liability when the manager moves money.

How This Differs From a Joint Account

A proxy account is fundamentally different from a joint account, and confusing the two causes real problems. Joint account holders are co-owners with equal rights to the funds, and when one dies, the survivor typically keeps the money through a right of survivorship. A proxy arrangement gives the manager no ownership interest at all. When the account owner dies, the money flows into the owner’s estate, not to the person who was managing it.

Types of Proxy Arrangements

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

Power of Attorney Accounts

This is the most common form for adults. The owner signs a power of attorney naming an agent to handle financial matters. A durable power of attorney remains in force even if the owner later becomes mentally incapacitated, which is why estate planners almost universally recommend the durable version.

An immediate durable power of attorney takes effect the moment it is signed. A springing power of attorney only activates when a condition is met, usually the owner’s incapacity. Springing versions sound attractive because they limit the agent’s authority to emergencies, but proving that the triggering condition has occurred can require a doctor’s certification or a court order, delaying access at exactly the moment urgency matters most. Most banks find immediate durable powers of attorney easier to work with.

The bank will require the original document or a certified copy, and the compliance team will check it for proper execution, notarization, and scope of authority.

Custodial Accounts for Minors

Custodial accounts under the Uniform Gifts to Minors Act (UGMA) or the Uniform Transfers to Minors Act (UTMA) are proxy arrangements for children. The minor is the legal owner. A custodian manages the money 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 cannot come back out to the person who deposited it. The custodian can invest and distribute funds for the child’s benefit, but the assets belong to the child throughout.

Once the child reaches the statutory age, the custodian’s authority ends automatically and the account must be retitled in the child’s name alone.

Fiduciary Accounts (Guardianship, Conservatorship, Trust)

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 to the financial institution before gaining 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 its creator and current trustee, and describes the trustee’s powers. Most states penalize institutions that unreasonably demand the full trust when a valid certification is available.

Representative Payee Accounts

When someone receives Social Security benefits but cannot manage the money independently, 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 their own money and title the account to show 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. Any money left over must be saved in an interest-bearing account for the beneficiary’s future needs. The SSA requires most payees to file an annual accounting report documenting funds received and spent.³ Becoming a representative payee requires completing Form SSA-11, typically through a face-to-face interview at a Social Security office.⁴

Convenience Accounts

Some states authorize a product called a convenience account, which works as a stripped-down proxy arrangement. The owner names someone as an authorized signer who can make deposits and withdrawals, but the signer has no ownership interest and no survivorship rights. When the owner dies, the money goes to the estate. These accounts fit situations where an elderly parent simply needs someone to run errands at the bank. They offer less protection than a formal power of attorney but are simpler to set up.

Setting Up a Proxy Account

The paperwork depends on which legal structure applies:

Power of attorney: the original executed document or a certified copy, which the bank will review for notarization, witness requirements, and whether it grants authority for the transactions you need.
Trust: a certification of trust or a certified copy of the trust agreement identifying the trustee and their powers.
Guardianship or conservatorship: current letters issued by the appointing court.
Representative payee: an SSA appointment letter following approval of the Form SSA-11 application.

Regardless of structure, the financial institution will require the manager to present government-issued identification and complete the institution’s own account application. That step links the manager’s identity to the account records and defines the scope of their access.

What the Manager Can and Cannot Do

Anyone managing another person’s money in a proxy arrangement is a fiduciary. That word carries real weight. 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 maintain thorough records. Violations can lead to removal, a civil lawsuit to repay the money, or criminal prosecution.⁵

No Self-Dealing

The manager cannot borrow, loan, or give the owner’s money to themselves or to 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.⁵ Mixing the owner’s funds with the manager’s personal accounts is a violation in every type of proxy arrangement. Most fiduciary disputes in practice trace back to this line, often because the boundary between “managing” and “borrowing” feels blurry to a family member handling a parent’s finances.

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 do not exceed the annual federal gift tax exclusion, which is $19,000 per recipient for 2026.⁶ The manager must also consider the owner’s obligations, maintenance needs, and history of making gifts before authorizing any transfer.

Investment Standard

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 is on preserving the owner’s capital and generating reasonable income, not chasing speculative returns. A manager with special investment expertise is held to a higher standard and is expected to use that expertise.

Record-Keeping

Records are not optional. The manager must track every dollar received and spent, keep receipts even for small expenses, and be prepared to produce a formal accounting on request.⁵ All checks and documents should be signed in a way that shows the agent’s role, such as “Jane Smith, as agent for John Smith,” rather than signing the owner’s name. Poor record-keeping is the fastest way to attract suspicion from other family members or a reviewing court.

When a Bank Rejects Your Documents

Banks reject powers of attorney more often than most people expect. Common reasons include a document that appears altered or incomplete, missing notarization or witness signatures, authority language that does not clearly cover the requested transaction, or a document from another state that uses unfamiliar formatting. Banks will also refuse a power of attorney if they have reason to believe it has been revoked or if they see red flags of financial exploitation.

One ground of refusal is specifically prohibited in states that have adopted the Uniform Power of Attorney Act: a bank cannot reject a valid power of attorney solely because it is not on the bank’s own proprietary form. Citing the state statute to the compliance department usually resolves that issue.

When you face rejection, ask for a written explanation. Many rejections stem from fixable issues, such as providing a copy when the bank requires a certified original, or presenting a document that grants general 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. The common termination triggers are the owner’s death, the owner’s revocation of authority, the agent’s death or incapacity, fulfillment of the arrangement’s purpose, or, for custodial accounts, the child reaching the age of majority.⁷

Revocation by the Owner

An 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 actually knows. The agent must receive actual notice, and every financial institution holding a copy of the document must be notified. 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 keep transacting if the bank was never told.⁷ Put the revocation in writing, deliver it to the agent and every institution that has the original on file, and keep proof of delivery.

Death of the Owner

A power of attorney terminates at the moment of the owner’s death.⁷ 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 are distributed under the will or, if there is none, under state intestacy law. Accessing the funds then requires probate documentation such as letters testamentary or, for smaller estates, a small estate affidavit.

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 is reason for concern.

Custodial Age-Out

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

Final Accounting

Whatever the reason for termination, the outgoing manager should prepare a final accounting covering the entire period of the arrangement. This report details every receipt, disbursement, investment gain or loss, and remaining balance, and it goes to the account owner, the successor trustee, or the executor of the estate. Skipping this step invites legal claims from beneficiaries or heirs who want to know where the money went.

Brokerage Accounts: A Boundary Worth Knowing

Proxy arrangements for investment accounts work slightly differently. To give someone authority to buy and sell securities on your behalf, most brokerage firms require either a power of attorney on file or, for ongoing management, a discretionary investment advisory account run by a registered professional.⁸ Discretionary authority lets the advisor execute trades without calling you for approval on each one.

One point regularly causes confusion. FINRA requires brokerage firms to ask customers for a “trusted contact person.” Naming a trusted contact gives that person no authority over your account. It authorizes the firm to reach out in limited situations, such as concerns about account activity or an inability to reach you.⁸ A trusted contact is an emergency contact, not a proxy.

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
Consumer Financial Protection Bureau. Help for Agents Under a Power of Attorney
6
Internal Revenue Service. Whats New – Estate and Gift Tax
7
Administration for Community Living. Power of Attorney Revocations 101
8
FINRA. Brokerage Accounts