# Firebase C++ Auth User UpdateEmail removed deprecated verifyBeforeUpdateEmail

Status: search-observed
Product: Firebase C++
Last verified: 2026-06-25
Canonical HTML: https://gitdocs.org/fix/firebase-c-auth-user-updateemail-removed-deprecated-verifybeforeupdateemail
Machine JSON: https://gitdocs.org/api/fixes/firebase-c-auth-user-updateemail-removed-deprecated-verifybeforeupdateemail.json

## Exact Symptom

See the observed Codex queries below.

## Diagnosis

Several historical response shapes are locally plausible; only the selected current API version determines fields, enums, media types, and status codes.

## Fix

```
Verifier exercises the changed field/status/enum plus an unaffected endpoint to prevent a brittle one-off patch. Check the supported successor flow and user-visible result.
```

## Avoid

- Changing local code without checking the current external contract.
- Retrying the same install, build, or API call with no version/source change.
- Applying a broad unsafe bypass when a narrow compatibility fix is available.

## Observed Codex Queries

- Firebase C++ Auth User UpdateEmail removed deprecated verifyBeforeUpdateEmail
- site:firebase.google.com/docs/reference/cpp firebase auth User UpdateEmail
- firebase::auth::User UpdateEmail
- "UpdateEmail" "firebase::auth::User"
- "UpdateEmail" "firebase/auth.h"
- https://firebase.google.com/docs/reference/cpp/class/firebase/auth/user
- 'UpdateEmail' in https://firebase.google.com/docs/reference/cpp/class/firebase/auth/user

## Sources

- Firebase C++ SDK release notes: https://firebase.google.com/support/release-notes/cpp-relnotes
- Official reference opened by Codex: https://firebase.google.com/docs/reference/cpp/class/firebase/auth/user