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

# Upsert Professional Details

> Create or update the seller's business registration details.

Upserts the seller's professional details and returns the full seller object.

## Path parameters

<ParamField path="id" type="string" required>
  The seller's ID.
</ParamField>

## Body parameters

<ParamField body="corporate_name" type="string">Registered corporate name.</ParamField>
<ParamField body="registration_number" type="string">Business registration number.</ParamField>
<ParamField body="tax_id" type="string">Tax identification number.</ParamField>
<ParamField body="additional_data" type="object">Custom data passed to workflow hooks.</ParamField>

## Query parameters

<ParamField query="fields" type="string">
  Comma-separated fields to include in the response.
</ParamField>

## Response

<ResponseField name="seller" type="object">
  <Expandable title="properties">
    <ResponseField name="id" type="string">The seller's ID.</ResponseField>
    <ResponseField name="professional_details" type="object">The updated professional details.</ResponseField>
  </Expandable>
</ResponseField>

<RequestExample>
  ```bash cURL theme={null}
  curl -X POST 'http://localhost:9000/vendor/sellers/sel_01HXYZ/professional-details' \
    -H 'Authorization: Bearer <token>' \
    -H 'x-seller-id: <seller_id>' \
    -H 'Content-Type: application/json' \
    -d '{"corporate_name": "Acme Inc.", "registration_number": "HRB 12345", "tax_id": "DE123456789"}'
  ```

  ```ts JS Client theme={null}
  const { seller } = await client.vendor.sellers.$id.professionalDetails.mutate({
    $id: "sel_01HXYZ",
    corporate_name: "Acme Inc.",
    registration_number: "HRB 12345",
    tax_id: "DE123456789",
  })
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "seller": {
      "id": "sel_01HXYZ",
      "name": "Acme Store",
      "professional_details": {
        "corporate_name": "Acme Inc.",
        "registration_number": "HRB 12345",
        "tax_id": "DE123456789"
      }
    }
  }
  ```
</ResponseExample>