How should security teams store a recovery code for two-factor authentication?

Store the recovery code in a place that is separate from the second factor and still accessible if a device is lost. A secure printed copy, an offline vault, or another protected location works well if it is protected like a credential. The key principle is resilience: if the authenticator app or security key is unavailable, the recovery code must still be recoverable.

Separate the Recovery Code From the Factor It Replaces

A recovery code should be treated as break-glass authentication material, not as a convenience note. It belongs in a different place from the authenticator app or security key, because its entire purpose is to restore access when the normal second factor is unavailable. Good storage keeps it reachable during loss, travel, device failure, or account lockout without making it easy to discover.

The best pattern is simple: store one copy offline or in a protected vault, and make sure that location is protected to the same standard you would use for a credential. That can mean a locked physical copy, an encrypted password manager entry, or a tightly controlled offline store, depending on the environment and the person who must recover the account.

A recovery code is only useful if it survives the same failure that took out the second factor. If the code sits on the same phone, in the same browser profile, or in the same synced note as the authenticator app, the recovery path fails at the exact moment it is needed.

What Good Storage Looks Like in Practice

The storage choice should balance recoverability and exposure. A printed copy in a secure location works well for personal or low-volume use because it is independent of device failure. An offline vault or encrypted secret store is better when teams need centralized control, auditability, or revocation. In either case, the code should be protected as sensitive authentication material, because anyone who finds it can bypass the second factor.

For team environments, avoid informal shared storage such as chat threads, ticket comments, shared drives, or unencrypted documents. Those locations are difficult to govern, hard to rotate away from, and often copied into places nobody remembers later. If the code must be shared for business continuity, use a controlled process with ownership, access review, and a clear recovery path.

This is why guidance on credential hygiene and secret placement matters. NHI Mgmt Group’s Ultimate Guide to NHIs notes that 96% of organisations store secrets outside secret managers in vulnerable locations, and that pattern is the same failure mode to avoid here: sensitive recovery material should not drift into casual storage.

Risk and Threat Considerations

Recovery codes are attractive to attackers because they can defeat a second-factor control without needing the authenticator app or device. If the code is stored in an exposed note, email archive, screenshot, browser sync, or shared file, an intruder can convert a limited foothold into full account access.

Failure mechanism: the code is placed in a location that is easier to compromise than the second factor itself, or it is stored alongside the factor so the same incident removes both recovery paths. That creates a single point of failure and, in many cases, a single point of compromise.

Impact: account takeover becomes much easier, especially for administrator, finance, or email accounts where a recovery code can unlock downstream systems, reset other credentials, or expose more sensitive data.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

OWASP Non-Human Identity Top 10 address the attack and risk surface, while CIS Controls v8, NIST CSF 2.0 and NIST SP 800-63 set the governance and control requirements practitioners need to meet.

Framework	Control / Reference	Relevance
CIS Controls v8	5 — Account Management	Recovery codes are sensitive account access material that must be stored and governed safely.
	6 — Access Control Management	Separate storage and limited access reduce the chance that a recovery code enables account takeover.
Recommendation — Protect recovery codes with controlled storage and access review as sensitive account material. Restrict access to recovery codes to only the people who may need to recover the account.
NIST CSF 2.0	PR.AA — Identity Management, Authentication, and Access Control	The answer centers on preserving a reliable authentication recovery path without weakening access control.
	RC.RP — Recovery Planning	The code exists to restore access after factor loss, which is a recovery objective.
Recommendation — Store recovery codes in a protected location that preserves recovery while maintaining authentication strength. Document how recovery codes are stored, retrieved, and replaced during account recovery.
NIST SP 800-63	5.1.5 — Recovery Codes	Digital identity guidance directly addresses recovery codes as a fallback authenticator mechanism.
Recommendation — Store recovery codes separately from the primary authenticator and protect them as sensitive authenticators.
OWASP Non-Human Identity Top 10	NHI-02 — Secrets and Credential Management	Recovery codes function as secret authentication material and should be protected accordingly.
Recommendation — Treat recovery codes as secrets and keep them in a controlled, protected storage location.

Practitioner Guidance

What to verify: confirm that the recovery code is not stored on the same device, in the same sync path, or in the same access domain as the second factor. If the code lives in a vault, make sure the vault itself remains available during a device-loss event and is protected with stronger access controls than ordinary notes or files.

Decision rule: if the recovery code would let a finder bypass MFA on a high-value account, store it like a credential, not like a reminder. If the environment cannot support a protected vault or locked physical copy, treat that as a continuity gap that needs a better recovery design before the code is issued.

Practitioner takeaway: the correct store is the one that preserves recovery without collapsing into the same failure domain as the second factor, because resilience is the whole point of the code.