---
icon: list-unordered
label: Parameters
order: 600
expanded: false
---

!!!
All reserved parameters (whether input or output) use the **re** prefix (e.g., **reSignature**).
!!!

## Input parameters

If **IncludeCustomInputParameters** is `true` in the Verification Result configuration then all non-reserved parameters are bypassed.

### Reserved parameters

#### Session Overrides

[!ref text="Check out the Session Override Configurations section"](/redirect/verification-configurations/#session-override-configurations)

#### Signature (`reSignature`)

[!ref text="Check out the Incoming signed Verification Url section"](/redirect/security/#incoming-signed-verification-url-request-integrity)


#### Expiration (`reExpiration`)

UTC unix epoch (seconds) at which the signed URL expires. After this timestamp the verification will be rejected with `410 Gone`.

Set automatically by the create-signature endpoint when `SecuritySettings.ExpirationEnabled` is `true`.

[!ref text="Check out the Incoming signed Verification Url section"](/redirect/security/#incoming-signed-verification-url-request-integrity)


#### Nonce (`reNonce`)

One-time-use identifier (GUID without dashes). The first successful session consumes the nonce; further attempts to open the same URL are rejected with `410 Gone`.

Set automatically by the create-signature endpoint when `SecuritySettings.EnableNonce` is `true`. Nonce requires expiration to be enabled.

[!ref text="Check out the Incoming signed Verification Url section"](/redirect/security/#incoming-signed-verification-url-request-integrity)


#### External identifier (`reExternalId`)

Some face recognition modes require a stable external identifier to link a user across sessions.

- `reExternalId` is **required** when face recognition is configured for:
  - `MatchVerification`
  - `UniqueMatchVerification`
- `reExternalId` is **optional** in other modes.

## Output parameters

### Result URL contract (integration output)

The **result redirect URL** is the primary integration contract.

- VerifEye redirects the browser to your configured result URL.
- The final URL contains query parameters describing the outcome.
- A signature parameter is appended to enable tamper detection.

The following parameter names are used:

- `reVerificationSessionId`
- `reVerificationResult`
- `reLivenessResult`
- `reFaceRecognitionResult`
- `reAgeVerificationResult`
- `reGenderVerificationResult`
- `reFaceId`
- `reAge`
- `reGender`
- `reCorrelationId`
- `reTotalFaceCount`
- `reFailedReason`
- `reSignature`

Parameter presence depends on your project configuration.





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*Last updated: 2026-02-03*