FINRA’s 5 October developer notice describes a forthcoming change to office addresses in U4 API submissions. The announced production window is the end of October 2026. An exact deployment time was not established in the notice checked on 27 October.[1]
At a glance01
The announced address rules
| Item | Detail |
|---|---|
| Registered main office or location with Branch CRD | A submitted address is ignored; the registered address staysSource 1 |
| Unregistered location without Branch CRD | New addresses and edits are acceptedSource 1 |
| Previous special case | bdMainOfficeIndicator could substitute the main-office addressSource 1 |
| Test environment | QA TESTSource 1 |
The practical risk is mistaking a successful submission for evidence that a registered address changed. A reconciliation should inspect the resulting authoritative value, rather than only the outbound payload. Main offices, registered branches and unregistered locations therefore need separate test cases.[1]
This is a field-behaviour change in a registration workflow. It does not establish a general exemption from keeping required registration information accurate.[1]
Sources & further reading
- Upcoming Change: U4 firmAssociations.officeLocations Address Behavior FINRA Developer Center · 5 Oct 2026 · Accessed 27 Oct 2026