diff --git a/util/sponsor/auth.go b/util/sponsor/auth.go
index 8a43521f6..57dbb7c28 100644
--- a/util/sponsor/auth.go
+++ b/util/sponsor/auth.go
@@ -1,5 +1,22 @@
 package sponsor
 
+// LICENSE
+
+// Copyright (c) evcc.io (andig, naltatis, premultiply)
+
+// This module is NOT covered by the MIT license. All rights reserved.
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
 import (
 	"context"
 	"fmt"
diff --git a/util/sponsor/docs.go b/util/sponsor/docs.go
new file mode 100644
index 000000000..f80021ba4
--- /dev/null
+++ b/util/sponsor/docs.go
@@ -0,0 +1,20 @@
+package sponsor
+
+// Package sponsor implements the sponsorship utilities
+
+// LICENSE
+
+// Copyright (c) evcc.io (andig, naltatis, premultiply)
+
+// This module is NOT covered by the MIT license. All rights reserved.
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
diff --git a/util/sponsor/pulsares.go b/util/sponsor/pulsares.go
index a3f2f8cb4..0012c76d6 100644
--- a/util/sponsor/pulsares.go
+++ b/util/sponsor/pulsares.go
@@ -1,5 +1,22 @@
 package sponsor
 
+// LICENSE
+
+// Copyright (c) evcc.io (andig, naltatis, premultiply)
+
+// This module is NOT covered by the MIT license. All rights reserved.
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
 import (
 	"os"
 	"strings"
diff --git a/util/sponsor/victron.go b/util/sponsor/victron.go
index c6a774780..c74bc5e11 100644
--- a/util/sponsor/victron.go
+++ b/util/sponsor/victron.go
@@ -1,5 +1,22 @@
 package sponsor
 
+// LICENSE
+
+// Copyright (c) evcc.io (andig, naltatis, premultiply)
+
+// This module is NOT covered by the MIT license. All rights reserved.
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
 import (
 	"context"
 	"errors"