diff --git a/iec_api/data.py b/iec_api/data.py
index 8a81819..0c3cc6b 100644
--- a/iec_api/data.py
+++ b/iec_api/data.py
@@ -286,3 +286,20 @@ async def get_invoice_pdf(
         session, url=GET_INVOICE_PDF_URL, headers=headers, json_data=request
     )
     return await response.read()
+
+
+async def get_invoice_pdf(
+    session: ClientSession, token: JWT, bp_number: int | str, contract_id: int | str, invoice_number: int | str
+) -> bytes:
+    """Get Device Type data response from IEC API."""
+    headers = commons.add_auth_bearer_to_headers(HEADERS_WITH_AUTH, token.id_token)
+    headers = headers.copy()  # don't modify original headers
+    headers.update({"accept": "application/pdf", "content-type": "application/json"})
+
+    request = GetPdfRequest(
+        invoice_number=str(invoice_number), contract_id=str(contract_id), bp_number=str(bp_number)
+    ).to_dict()
+    response = await commons.send_non_json_post_request(
+        session, url=GET_INVOICE_PDF_URL, headers=headers, json_data=request
+    )
+    return await response.read()
diff --git a/iec_api/iec_client.py b/iec_api/iec_client.py
index 7d8baf3..d46f89e 100644
--- a/iec_api/iec_client.py
+++ b/iec_api/iec_client.py
@@ -422,9 +422,11 @@ async def get_kwh_tariff(self) -> float:
 
         return self._kwh_tariff
 
+
     async def get_usage_calculator(self) -> UsageCalculator:
         return await static_data.get_usage_calculator(self._session)
 
+
     async def get_efs_messages(
         self, contract_id: Optional[str] = None, service_code: Optional[int] = None
     ) -> Optional[List[EfsMessage]]: