> ## Documentation Index
> Fetch the complete documentation index at: https://docs.verifyyou.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Uniqueness Regions

> Scope one-account-per-person limits to specific contexts like competitions, forms, or servers.

By default, each verified person is limited to one account across your entire integration, which prevents duplicate accounts and fraud.

Pass a `region` to scope that limit per context. Each verified person is limited to one account **per region**, so they can't create duplicates within the same context. Users who are already verified can connect to new regions instantly without redoing the liveness check.

Use this when you need to ensure one real human per context: for example, one account per competition, one response per form, or one player per server.

<CodeGroup>
  ```javascript Node.js theme={null}
  const response = await fetch("https://api.connect.verifyyou.com/v2/verification/create", {
    method: "POST",
    headers: {
      "API-KEY": process.env.VERIFYYOU_API_KEY,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      redirect: "https://yourapp.com/verified",
      region: "survey_q3_2026",
    }),
  });

  const data = await response.json();
  ```

  ```python Python theme={null}
  import requests

  response = requests.post(
      "https://api.connect.verifyyou.com/v2/verification/create",
      headers={"API-KEY": VERIFYYOU_API_KEY},
      json={
          "redirect": "https://yourapp.com/verified",
          "region": "survey_q3_2026",
      },
  )

  data = response.json()
  ```

  ```typescript TypeScript theme={null}
  const response = await fetch("https://api.connect.verifyyou.com/v2/verification/create", {
    method: "POST",
    headers: {
      "API-KEY": process.env.VERIFYYOU_API_KEY!,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      redirect: "https://yourapp.com/verified",
      region: "survey_q3_2026",
    }),
  });

  const data: { verification_url: string; external_id: string } = await response.json();
  ```

  ```csharp C# theme={null}
  using var client = new HttpClient();
  client.DefaultRequestHeaders.Add("API-KEY", Environment.GetEnvironmentVariable("VERIFYYOU_API_KEY"));

  var response = await client.PostAsync(
      "https://api.connect.verifyyou.com/v2/verification/create",
      new StringContent(
          """{"redirect": "https://yourapp.com/verified", "region": "survey_q3_2026"}""",
          System.Text.Encoding.UTF8,
          "application/json"
      )
  );

  var body = await response.Content.ReadAsStringAsync();
  ```

  ```java Java theme={null}
  var request = HttpRequest.newBuilder()
      .uri(URI.create("https://api.connect.verifyyou.com/v2/verification/create"))
      .header("Content-Type", "application/json")
      .header("API-KEY", System.getenv("VERIFYYOU_API_KEY"))
      .POST(HttpRequest.BodyPublishers.ofString(
          "{\"redirect\": \"https://yourapp.com/verified\", \"region\": \"survey_q3_2026\"}"
      ))
      .build();

  var response = client.send(request, HttpResponse.BodyHandlers.ofString());
  ```

  ```php PHP theme={null}
  $response = file_get_contents("https://api.connect.verifyyou.com/v2/verification/create", false,
      stream_context_create(["http" => [
          "method" => "POST",
          "header" => "Content-Type: application/json\r\nAPI-KEY: " . $apiKey,
          "content" => json_encode([
              "redirect" => "https://yourapp.com/verified",
              "region" => "survey_q3_2026",
          ]),
      ]])
  );

  $data = json_decode($response, true);
  ```

  ```go Go theme={null}
  body, _ := json.Marshal(map[string]string{
      "redirect": "https://yourapp.com/verified",
      "region":   "survey_q3_2026",
  })

  req, _ := http.NewRequest("POST",
      "https://api.connect.verifyyou.com/v2/verification/create",
      bytes.NewBuffer(body),
  )
  req.Header.Set("Content-Type", "application/json")
  req.Header.Set("API-KEY", os.Getenv("VERIFYYOU_API_KEY"))

  resp, _ := http.DefaultClient.Do(req)
  defer resp.Body.Close()
  ```
</CodeGroup>

<Info>
  Region strings are arbitrary; define them however makes sense for your product. Something descriptive and stable like `survey_abc123` or `event_2026_austin` works better than a timestamp.
</Info>