diff --git a/cg/meta/orders/utils.py b/cg/meta/orders/utils.py
new file mode 100644
index 0000000000..2663271610
--- /dev/null
+++ b/cg/meta/orders/utils.py
@@ -0,0 +1,27 @@
+from cg.models.orders.constants import OrderType
+from cg.services.orders.constants import ORDER_TYPE_WORKFLOW_MAP
+from cg.services.orders.validation.models.case import Case
+from cg.services.orders.validation.models.order import Order
+from cg.services.orders.validation.models.order_with_cases import OrderWithCases
+
+
+def contains_existing_data(order: OrderWithCases) -> bool:
+    """Check if the order contains any existing data"""
+
+    for enumerated_case in order.enumerated_cases:
+        case: Case = enumerated_case[1]
+        if case.enumerated_existing_samples:
+            return True
+    return False
+
+
+def get_ticket_tags(order: Order, order_type: OrderType) -> list[str]:
+    """Generate ticket tags based on the order and order type"""
+
+    tags: list[str] = [ORDER_TYPE_WORKFLOW_MAP[order_type]]
+
+    if isinstance(order, OrderWithCases):
+        if contains_existing_data(order):
+            tags.append("existing-data")
+
+    return tags
diff --git a/cg/services/orders/submitter/ticket_handler.py b/cg/services/orders/submitter/ticket_handler.py
index 54ff979156..8cb2bfe2c5 100644
--- a/cg/services/orders/submitter/ticket_handler.py
+++ b/cg/services/orders/submitter/ticket_handler.py
@@ -5,6 +5,7 @@
 
 from cg.clients.freshdesk.freshdesk_client import FreshdeskClient
 from cg.clients.freshdesk.models import TicketCreate, TicketResponse
+from cg.meta.orders.utils import get_ticket_tags
 from cg.models.orders.constants import OrderType
 from cg.services.orders.constants import ORDER_TYPE_WORKFLOW_MAP
 from cg.services.orders.validation.models.order import Order
@@ -37,6 +38,8 @@ def create_ticket(
             order_type=order_type,
         )
 
+        tags: list[str] = get_ticket_tags(order=order, order_type=order_type)
+
         with TemporaryDirectory() as temp_dir:
             attachments: Path = self.create_attachment_file(order=order, temp_dir=temp_dir)
 
@@ -47,7 +50,7 @@ def create_ticket(
                 name=user_name,
                 subject=order.name,
                 type="Order",
-                tags=[ORDER_TYPE_WORKFLOW_MAP[order_type]],
+                tags=tags,
                 custom_fields={
                     "cf_environment": self.env,
                 },
diff --git a/tests/fixture_plugins/orders_fixtures/order_fixtures.py b/tests/fixture_plugins/orders_fixtures/order_fixtures.py
index 3b290c0aa1..c92d1f15a3 100644
--- a/tests/fixture_plugins/orders_fixtures/order_fixtures.py
+++ b/tests/fixture_plugins/orders_fixtures/order_fixtures.py
@@ -2,6 +2,7 @@
 
 import pytest
 
+from cg.services.orders.validation.models.existing_sample import ExistingSample
 from cg.services.orders.validation.workflows.balsamic.models.order import BalsamicOrder
 from cg.services.orders.validation.workflows.fastq.models.order import FastqOrder
 from cg.services.orders.validation.workflows.fluffy.models.order import FluffyOrder
@@ -135,3 +136,14 @@ def tomte_order(tomte_order_to_submit: dict, ticket_id_as_int: int) -> TomteOrde
     tomte_order = TomteOrder.model_validate(tomte_order_to_submit)
     tomte_order._generated_ticket_id = ticket_id_as_int
     return tomte_order
+
+
+@pytest.fixture
+def mip_dna_order_with_existing_samples(mip_dna_order_to_submit: dict) -> MipDnaOrder:
+    """Returns a MIP DNA order containing an existing sample."""
+    mip_dna_order_to_submit["user_id"] = 1
+    mip_dna_order_with_existing_samples = MipDnaOrder.model_validate(mip_dna_order_to_submit)
+    mip_dna_order_with_existing_samples.cases[0].samples.append(
+        ExistingSample(internal_id="ACC1234")
+    )
+    return mip_dna_order_with_existing_samples
diff --git a/tests/services/orders/submitter/test_order_submitter.py b/tests/services/orders/submitter/test_order_submitter.py
index 57edb4458c..a42292d9d9 100644
--- a/tests/services/orders/submitter/test_order_submitter.py
+++ b/tests/services/orders/submitter/test_order_submitter.py
@@ -5,6 +5,7 @@
 
 from cg.clients.freshdesk.models import TicketResponse
 from cg.exc import TicketCreationError
+from cg.meta.orders.utils import get_ticket_tags
 from cg.models.orders.constants import OrderType
 from cg.services.orders.constants import ORDER_TYPE_WORKFLOW_MAP
 from cg.services.orders.storing.constants import MAF_ORDER_ID
@@ -180,3 +181,28 @@ def test_submit_ticketexception(
             order_submitter.submit(
                 raw_order=raw_order, user=user, order_type=mip_dna_order.order_type
             )
+
+
+@pytest.mark.parametrize(
+    "order_fixture, order_type, expected_tags",
+    [
+        ("mip_dna_order_with_existing_samples", OrderType.MIP_DNA, ["mip-dna", "existing-data"]),
+        ("mip_dna_order", OrderType.MIP_DNA, ["mip-dna"]),
+    ],
+)
+def test_get_ticket_tags(
+    request: pytest.FixtureRequest,
+    order_fixture: str,
+    order_type: OrderType,
+    expected_tags: list[str],
+):
+    """Test that the correct tags are generated based on the order and order type."""
+
+    # GIVEN an order with existing data
+    order: OrderWithCases = request.getfixturevalue(order_fixture)
+
+    # WHEN getting the ticket tags
+    tags = get_ticket_tags(order=order, order_type=order_type)
+
+    # THEN the tags should be correct
+    assert tags == expected_tags