diff --git a/backend/tests/test_tc004.py b/backend/tests/test_tc004.py
new file mode 100644
index 0000000..ec60360
--- /dev/null
+++ b/backend/tests/test_tc004.py
@@ -0,0 +1,71 @@
+from rest_framework.test import APITestCase
+from django.contrib.auth import get_user_model
+
+class TestTC004(APITestCase):
+    """
+    TestTC004 is a test case class designed to validate the behavior of the API when creating offers between users.
+
+    This test case includes:
+    - Validation of error handling when the recipient user does not exist (`test_non_existing_user`).
+    - Validation of error handling when the recipient is not a coach (`test_non_coach_user`).
+    - Validation of successfully creating a valid offer to a coach (`test_valid_offer`).
+
+    The tests ensure that the API correctly handles offer creation, including proper validation of recipient users and their roles.
+    """
+    def setUp(self):
+        self.athlete = get_user_model().objects.create_user(
+            username="athlete",
+            email='athlete@example.com',
+            password="athletetest"
+        )
+
+        self.coach = get_user_model().objects.create_user(
+            username="coach",
+            email='coach@example.com',
+            password="coachtest",
+            isCoach=True,
+            specialism="specialism"
+        )
+
+        self.client.force_authenticate(self.athlete)
+
+
+    def test_non_existing_user(self):
+        response = self.client.post(
+            "/api/offers/",
+            {
+                "recipient": "/api/users/999999/",
+                "status": "p",
+            },
+            format="json"
+        )
+        print(f"Response data: {response.data}")
+        print(f"Response status code: {response.status_code}")
+        assert response.status_code == 400
+
+    def test_non_coach_user(self):
+        response = self.client.post(
+            "/api/offers/",
+            {
+                "recipient": f"/api/users/{self.athlete.id}/",
+                "status": "p",
+            },
+            format="json"
+        )
+        print(f"Response data: {response.data}")
+        print(f"Response status code: {response.status_code}")
+        assert response.status_code == 400
+
+    def test_valid_offer(self):
+        # Add the coach as coach and store offer url to accept the offer
+        response = self.client.post(
+            "/api/offers/",
+            {
+                "recipient": f"/api/users/{self.coach.id}/",
+                "status": "p",
+            },
+            format="json"
+        )
+        print(f"Response data: {response.data}")
+        print(f"Response status code: {response.status_code}")
+        assert response.status_code == 201
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