What the primary record establishes

For fully disclosed accounts introduced by one US broker to another, FINRA Rule 4311 requires the agreement to allocate responsibilities. The carrying firm is responsible for safeguarding funds and securities for Rule 15c3-3 and for preparing and transmitting statements. FINRA Rule 4311 ↗

What the distinction changes

Under the rule’s conditions the carrying firm may authorize the introducing firm to prepare or send statements on its behalf. A logo on the portal can identify the delivery channel while the account documents explain responsibility.

What to check before drawing a conclusion

If a monthly statement shows $2,000 and the trading portal $2,500, first compare dates and distinguish cash from buying power. Written disclosures at opening and after material changes help customers and operations staff route unresolved discrepancies.