Customer consent does not replace firm rules. Check written authority, loan categories and new-issue restrictions.
Four rules with one shape
Unauthorized trading is entering an order the customer did not authorize. The authorization must be specific to the trade — the security, the side and the amount — unless the representative holds written discretionary authority accepted by the firm. A vague instruction to do what seems best is not authorization for a particular trade; it is a request for discretion, and discretion has to be documented in advance.
The usual sharing rule requires prior written authorization from both customer and firm, and sharing in direct proportion to financial contributions. Immediate-family accounts are exempt from the proportional-share limit, but still need the written approvals.
Customer loans require firm procedures that permit them and a listed category. Categories include immediate family, an ordinary-course commercial lender, two registered persons of the same firm, and qualifying personal or business relationships outside the broker-customer relationship. The last three categories require prior written firm approval. Procedures may waive notice or approval for family and ordinary-course lender categories. Customer consent alone does not satisfy the rule.
Restricted persons, including broker-dealers, associated persons and certain relatives, are generally barred from buying new equity issues, subject to defined Rule 5130 exceptions. Firm approval alone cannot waive a restriction.
Rule 2165 permits a temporary hold for suspected financial exploitation when its conditions are met. A Specified Adult is age 65 or older, or age 18 or older with a mental or physical impairment the firm reasonably believes prevents protection of their own interests. Age 65 is not the only route. A hold is permitted, not required; notice, internal review and other rule conditions apply.
Signatures belong to the person whose name they are. Forgery is signing or affixing another person’s name or initials on a document without that person’s prior permission; falsification is creating a document or entry that gives a false appearance through altered or untrue information. FINRA treats both as violations of Rule 2010, and where the document is a firm book or record, of Rule 4511 as well. A representative who signs a customer’s name on an account form or wire instruction to save time is committing forgery, even if the customer would have agreed.
Customer money, promises against loss and the trusted contact
Two more prohibitions sit in the same FINRA rule as sharing, and neither has an approval route. No member or associated person may make improper use of a customer’s securities or funds: moving a customer’s cash to cover a personal trade is misuse the moment it happens, whether or not the money comes back before the next statement. And no member or associated person may guarantee a customer against loss, however the promise is worded or put in writing.
For every account other than an institutional one, the firm makes reasonable efforts at opening to get the details of a trusted contact person, someone the customer authorizes the firm to contact, and a customer who declines can still open the account. The firm may contact that person to address possible exploitation, or to confirm contact details, health status or a guardian, executor, trustee or holder of a power of attorney. The trusted contact gets no power to trade.
Exam terms
- Unauthorized trade
- An order entered without the customer’s specific authorization or written discretion.
- Sharing in an account
- Sharing profits and losses; prior written approvals and generally a proportional contribution.
- Borrowing from a customer
- Prohibited unless firm procedures and a permitted category both apply.
- New issue
- An initial public offering of equity, subject to the restricted-person rule.
- Restricted person
- Someone generally barred from new equity issues, including industry people and certain relatives; defined exceptions exist.
- Temporary hold
- A permitted pause under Rule 2165 for suspected exploitation of a Specified Adult, subject to rule conditions.
What the customer can permit, and what the firm must
| A customer alone can permit | The firm must also permit | |
|---|---|---|
| A specific trade | Yes, trade by trade | Only if it is discretionary |
| Ongoing discretion | No | Written authority, accepted by the firm |
| Sharing in the account | No | Prior written approvals; generally proportional, with immediate-family exception |
| Lending to the representative | No | Firm procedures and a permitted category |
| Buying a new issue | No | Generally barred for restricted persons; check rule exceptions |
Try it: Compare a specific order to buy 300 named shares with a request to choose all future trades. Which needs written discretion accepted by the firm? The second. For a customer loan, first ask whether a listed category applies, then check firm procedures and required approval. A long broker-client relationship alone is not an outside personal relationship.
The paperwork offenses
Falsifying, backdating or fabricating a firm record is misconduct. Firms must keep accurate records under applicable recordkeeping rules. Do not confuse a lawful, recorded correction with concealment or fabrication.
The second is withholding. FINRA staff may require a member, a person associated with a member, or any other person subject to FINRA’s jurisdiction to provide information orally, in writing or electronically, and to permit the inspection and copying of books, records and accounts, with respect to any matter involved in an investigation, complaint, examination or proceeding. No member and no such person may fail to provide that information or testimony, or fail to permit that inspection.
Follow firm procedures to fulfill a valid FINRA request. Embarrassment does not excuse withholding required information. Rule 8210 prohibits failure to provide information or permit inspection pursuant to the rule; this duty does not depend on whether FINRA later proves the underlying allegation.
Exam terms
- Falsifying a record
- Altering, backdating or fabricating a firm record; misconduct in its own right.
- Withholding documents
- Failing to provide information or permit inspection when FINRA requires it.
The closest contrast
Customer consent: not enough.
Check the rule for the activity.
Customer agreement cannot replace the rule. Discretion, sharing and loans have different conditions. Identify the activity, then apply its conditions.
Worked example
A representative is offered a $20,000 loan by a long-standing customer. No family, lending-business, same-firm or qualifying outside relationship applies. The representative also seeks a personal IPO allocation with no Rule 5130 exception.
- A customer loan needs firm procedures that permit it and a listed category.
- A long broker-client relationship alone does not qualify. An outside personal relationship can qualify, but these facts rule it out. Approval cannot create a missing category.
- An associated person is a restricted person. With no rule exception here, the IPO purchase is prohibited. Ordinary firm approval cannot permit it.
- Decline these requests and follow firm reporting and recordkeeping procedures.
Check yourself
Try a question, then read the explanation to review the rule.
Opening your study record…
Same rule, new context
Opening your study record…
Summary
- Trade authority is specific unless prior written discretion has been granted and accepted.
- Sharing generally needs prior written approvals and a proportional contribution. Immediate-family accounts have a proportionality exception. Improper use of customer funds and promises against loss have no approval route.
- Customer loans need firm procedures and a permitted category. A qualifying outside personal relationship can be a category.
- Restricted persons are generally barred from new equity issues, subject to defined exceptions.
- Specified Adults can qualify at age 65, or from age 18 with a qualifying impairment. A trusted contact is requested at opening, is optional, and holds no trading power.
- Keep accurate records and comply with valid FINRA information requests.
Related practice
- Unauthorized trading, sharing and borrowingPractice this
- Falsifying or withholding documentsPractice this
- Trusted contact person: asking, opening without one, and the rolePractice this
- Customer funds: improper use and promises against lossPractice this
Sources
- SIE Examination Content Outline (2025) · FINRA · checked 2026-10-12
- FINRA Rule 5130 — Restrictions on the Purchase and Sale of Initial Equity Public Offerings · FINRA · checked 2026-09-02
- FINRA Rule 3240 — Prohibition on Borrowing From or Lending to Customers · FINRA · checked 2026-09-20
- FINRA Rule 8210 — Provision of Information and Testimony and Inspection and Copying of Books · FINRA · checked 2026-09-04
- FINRA Rule 4511 — Books and Records, General Requirements · FINRA · checked 2026-09-04
- FINRA Rule 2150 — Improper Use of Customers’ Securities or Funds; Prohibition Against Guarantees and Sharing in Accounts · FINRA · checked 2026-09-04
- FINRA Rule 3260 — Discretionary Accounts · FINRA · checked 2026-09-04
- FINRA Rule 2165 — Financial Exploitation of Specified Adults · FINRA · checked 2026-09-04
- FINRA Regulatory Notice 22-18 — Digital Signature Forgery and Falsification · FINRA · checked 2026-09-29
- FINRA Rule 2150 — Improper Use of Customers' Securities or Funds; Prohibition Against Guarantees and Sharing in Accounts, paragraphs (a) and (b) · FINRA · checked 2026-10-09
- FINRA Rule 4512 — Customer Account Information: paragraph (a)(1)(F) and Supplementary Material .06 (Trusted Contact Person) · FINRA · checked 2026-10-09
- Investor Bulletin: Why You Should Consider Adding a Trusted Contact to Your Account (FINRA, August 25, 2025) · FINRA · checked 2026-10-09