diff --git a/core/management/commands/deepl_translate.py b/core/management/commands/deepl_translate.py
index 84691008..70f4c9f1 100644
--- a/core/management/commands/deepl_translate.py
+++ b/core/management/commands/deepl_translate.py
@@ -130,7 +130,7 @@ class Command(BaseCommand):
         try:
             import readline
         except ImportError:
-            readline = None    # type: ignore [assignment]
+            readline = None  # type: ignore [assignment]
 
         for target_lang in target_langs:
             api_code = DEEPL_TARGET_LANGUAGES_MAPPING.get(target_lang)
diff --git a/core/models.py b/core/models.py
index 9aadd4d8..3b4edebe 100644
--- a/core/models.py
+++ b/core/models.py
@@ -1543,7 +1543,6 @@ class Order(ExportModelOperationsMixin("order"), NiceModel):  # type: ignore [mi
 
     def apply_addresses(self, billing_address_uuid: str | None = None, shipping_address_uuid: str | None = None):
         try:
-
             if not any([shipping_address_uuid, billing_address_uuid]) and not self.is_whole_digital:
                 raise ValueError(_("you can only buy physical products with shipping address specified"))
 
diff --git a/core/signals.py b/core/signals.py
index 8e60b6a5..c2f8d3f1 100644
--- a/core/signals.py
+++ b/core/signals.py
@@ -115,7 +115,7 @@ def process_order_changes(instance, created, **_kwargs):
                 instance.status = "FAILED"
                 instance.save()
 
-        if instance.status == "FINISHED":
+        if instance.status == "FINISHED" and not instance.attributes.get("system_email_sent", False):
             send_order_finished_email.delay(instance.uuid)
 
 
diff --git a/core/utils/emailing.py b/core/utils/emailing.py
index c262bf50..0f8d9388 100644
--- a/core/utils/emailing.py
+++ b/core/utils/emailing.py
@@ -132,6 +132,9 @@ def send_order_finished_email(order_pk: str) -> tuple[bool, str]:
     if not order.user:
         return False, f"Order's user not found with the given pk: {order_pk}"
 
+    if order.attributes.get("system_email_sent"):
+        return True, str(order.uuid)
+
     digital_ops = []
 
     for digital_op in order.order_products.filter(
@@ -160,4 +163,10 @@ def send_order_finished_email(order_pk: str) -> tuple[bool, str]:
 
     send_thank_you_email(shipped_ops)
 
+    if type(order.attributes) is not dict:
+        order.attributes = {}
+
+    order.attributes["system_email_sent"] = True
+    order.save()
+
     return True, str(order.uuid)
diff --git a/evibes/settings/drf.py b/evibes/settings/drf.py
index 1c4bca08..4603afc5 100644
--- a/evibes/settings/drf.py
+++ b/evibes/settings/drf.py
@@ -1,8 +1,6 @@
 from datetime import timedelta
 from os import getenv
 
-from django.utils.translation import gettext_lazy as _
-
 from evibes.settings.base import DEBUG, EVIBES_VERSION, SECRET_KEY
 from evibes.settings.constance import CONSTANCE_CONFIG
 
@@ -74,7 +72,7 @@ Current API version: {EVIBES_VERSION}
 """
 )  # noqa: E501, F405
 
-SPECTACULAR_PLATFORM_DESCRIPTION = (f"""
+SPECTACULAR_PLATFORM_DESCRIPTION = f"""
 Welcome to the {
     CONSTANCE_CONFIG.get("PROJECT_NAME")[0]  # type: ignore [index]
 } Platform API documentation.
@@ -106,7 +104,7 @@ The {
 
 ## Version
 Current API version: {EVIBES_VERSION}
-""")  # noqa: E501, F405
+"""  # noqa: E501, F405
 
 SPECTACULAR_PLATFORM_SETTINGS = {
     "TITLE": f"{CONSTANCE_CONFIG.get('PROJECT_NAME')[0]} API",  # type: ignore [index]