# Generate a shipment label for this online transaction's parcel

This endpoint returns a PDF containing the label for the
transaction's parcel. Both sender and recipient details
have to be submitted before making a call to this endpoint.

Endpoint: POST /api/v1/transactions/{transaction_id}/generate_shipment_label
Version: 0.1.0
Security: OAuth2, APIKey

## Path parameters:

  - `transaction_id` (integer, required)

## Query parameters:

  - `carrier` (string, required)

## Header parameters:

  - `Trustap-User` (string)
    Required in client flows, where you make API calls on behalf of another Trustap user.

## Response 200 fields (application/json):

  - `label` (string, required)

## Response 400 fields (application/json):

  - `code` (string, required)

  - `error` (string, required)
    A contextual description of the error that occurred. When
handling errors the `code` field should be used to determine
the type of error that occurred, as the text in the `error`
field may change unexpectedly.

## Response 403 fields (application/json):

  - `code` (string, required)

  - `error` (string, required)
    A contextual description of the error that occurred. When
handling errors the `code` field should be used to determine
the type of error that occurred, as the text in the `error`
field may change unexpectedly.