> **Source:** https://knowledge.leegality.com/document-execution/api/activate-pack-invitation
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---
# POST /v4/packs/invitations/activate — Activate invitation

:::info[Sandbox endpoint]

**Authentication:** `X-Auth-Token` header required on every request.

## Request URL

```
POST https://app1.leegality.com/api/v4/packs/invitations/activate
```

**Environments:**
- Production: `https://app1.leegality.com/api/v4/packs/invitations/activate`
- Sandbox: `https://sandbox.leegality.com/api/v4/packs/invitations/activate`

---

## Request Body

**Content-Type:** `application/json`

| Field | Type | Required | Description | Example |
|-------|------|----------|-------------|---------|
| `signUrl` | string | Yes | The invitation's sign URL — the per-person signing link for the invitee to activate. **Required.** | `https://app1.leegality.com/sign/abc123` |

### Sample Request

```json
{
  "signUrl": "https://app1.leegality.com/sign/abc123"
}
```

---

## Responses

### 200 — Invitation activated. Returns all invitations that were activated (the requested one plus any group siblings).

**Error codes**

The request is rejected if any of the following applies:

| Scenario | Result |
| --- | --- |
| `signUrl` missing, empty, null, an array, or invalid JSON body | 400 `LE_ERR_AP_057` |
| `signUrl` invalid, not found, or from a different tenant | 404 `LE_ERR_AP_016` |
| Invitation already active | `INVITATION_ALREADY_ACTIVE` |
| Invitation already signed | `INVITATION_SIGNED` |
| Invitation rejected | `INVITATION_REJECTED` |
| Invitation completed | `INVITATION_COMPLETED` |
| `preventChangesToSigningOrder` is `true` for the pack | `SIGNING_ORDER_LOCKED` |
| Expired JWT | 401 `LE_ERR_AP_080` |
| Missing auth token | 403 Access Denied |

| Field | Type | Required | Description | Example |
|-------|------|----------|-------------|---------|
| `data` | object | No | Response payload. See **data** below. | — |

#### data

Response payload.

| Field | Type | Required | Description | Example |
|-------|------|----------|-------------|---------|
| `activatedInvitations` | array\<object\> | No | All invitations that were activated — the requested one plus any siblings in the same invitee group. See **activatedInvitations** below. | — |

##### activatedInvitations

| Field | Type | Required | Description | Example |
|-------|------|----------|-------------|---------|
| `signUrl` | string | No | The activated invitation's sign URL. | `https://app1.leegality.com/sign/abc123` |
| `status` | string | No | New status of the invitation (`ACTIVE`). | `ACTIVE` |
| `activatedAt` | string | No | Activation timestamp (ISO 8601). | `2026-02-10T12:00:00Z` |
| `notificationSent` | boolean | No | Whether a notification was sent to this invitee. | `true` |

### Sample Response (200)

```json
{
  "data": {
    "activatedInvitations": [
      {
        "signUrl": "https://app1.leegality.com/sign/abc123",
        "status": "ACTIVE",
        "activatedAt": "2026-02-10T12:00:00Z",
        "notificationSent": true
      }
    ]
  }
}
```