How to Deal With Stock Brokers and Sub-Brokers: Check Dos and Don'ts

Stock brokers and sub-brokers bridge the gap between investors and the securities market by executing orders and maintaining accounts. To deal safely with stock brokers and sub-brokers, investors should verify their registration, understand the terms and charges, and follow proper trading and payment procedures. Investors must note that sub-brokers are now referred to as Authorised Persons (APs) in India.

This article outlines the dos and don'ts while dealing with stock brokers and sub-brokers.

Key Takeaways

• Always verify that a broker or Authorised Person holds a valid, active SEBI registration before onboarding.
• Never share trading passwords, OTPs, or sign blank forms, Delivery Instruction Slips (DIS), or unparsed DDPI (Demat Debit and Pledge Instruction) forms.
• Mandate contract notes and electronic account statements for every transaction, cross-checking them independently via exchange trade verification portals.
• Make all payments exclusively through traceable banking channels directly in the registered stock broker's name. Never pay cash or issue cheques to individual sub-brokers.
• Comply with modern SEBI norms by completing mandatory nomination (up to three nominees) or an explicit opt-out declaration for single-holder accounts.

Who are Stock Brokers and Sub-Brokers?

A stock broker is a corporate member of a recognised stock exchange registered with SEBI. A sub-broker (now Authorised Person) acts as an agent, connecting investors to the main broker. Regardless of the label, identical investor protection rules apply to any intermediary facilitating market access.

Essential Dos and Don'ts Checklist

Dos

• Verify registration: Cross-check registration numbers on SEBI or exchange portals.
• Read documents carefully: Review KYC forms, Risk Disclosure Documents, and standard policies before signing.
• Use Pledge-repledge for margins: Keep securities in your own Demat account, utilising the official depository pledge system rather than transferring shares directly to a broker pool.
• Insist on contract notes: Ensure digital or physical contract notes reach you within 24 hours of trade execution.
• Opt for modern nomination: Designate up to three nominees with clear percentage allocations or submit a formal opt-out declaration for single-holder demat accounts.

Don'ts

• Don't deal with unregistered intermediaries: Avoid unauthorised entities or unregistered tipsters offering guaranteed returns.
• Don't share credentials: Never disclose trading passwords or secure OTPs to anyone, including brokerage staff.
• Don't use cash or third-party cheques: Eliminate cash transactions. Make payments solely via account payee channels in the main broker's favour.
• Don't execute blanket PoAs: Restrict Power of Attorney authorisations strictly to defined operational scopes.
• Don't touch Dabba Trading: Stay away from illegal, off-exchange informal trading networks that provide zero regulatory recourse.

Operational Area	Safe Practice (Mandatory "Dos")	Risky Practice (Strict "Don'ts")
Broker Verification	Cross-verify the broker's SEBI Registration Number directly on official exchange portals (NSE/BSE) and the SEBI website.	Act on stock tips, recommendations, or advisory services from unregistered finfluencers, random WhatsApp groups, or anonymous tipsters.
Account Authorisations	Limit Demat Debit and Pledge Instruction (DDPI) authorizations strictly to trade pay-ins and margin pledging.	Sign blank Delivery Instruction Slips (DIS) or unparsed, full Limit Demat Debit and Pledge Instruction (DDPI) authorisations strictly to pay-in obligations for executed trades and margin pledging.
Margin Operations	Utilise the official Pledge-Repledge system so that your shares securely remain inside your own Demat account.	Transfer your shares directly into a broker’s pool account for margin requirements.
Fund Transfers	Process all payments exclusively through UPI or net banking directly to the broker's registered bank account or utilise Secondary Market ASBA (UPI Block Facility), which allows you to trade while funds remain safely blocked in your own bank account earning interest.	Hand over cash, transfer funds to individual Authorised Persons (APs), sub-brokers, or third-party accounts, or keep idle cash sitting in broker pool accounts.
Trade Audit Trail	Cross-check your contract notes within 24 hours of execution and regularly monitor weekly SMS and email alerts sent by the exchanges.	Ignore trade confirmation alerts or rely on verbal guarantees from advisors and brokers.