diff --git a/lnbits/fiat/base.py b/lnbits/fiat/base.py
index b907c7d78..126ed4d4c 100644
--- a/lnbits/fiat/base.py
+++ b/lnbits/fiat/base.py
@@ -95,10 +95,6 @@ class FiatSubscriptionPaymentOptions(BaseModel):
         description="Unique ID that can be used to identify the subscription request."
         "If not provided, one will be generated.",
     )
-    customer_id: str | None = Field(
-        default=None,
-        description="The fiat provider customer ID to use for the subscription.",
-    )
     customer_email: str | None = Field(
         default=None,
         description="The customer email to use for the subscription.",
diff --git a/lnbits/fiat/revolut.py b/lnbits/fiat/revolut.py
index 017cb10bb..6fae67f3e 100644
--- a/lnbits/fiat/revolut.py
+++ b/lnbits/fiat/revolut.py
@@ -372,16 +372,11 @@ class RevolutWallet(FiatProvider):
     async def _get_subscription_customer_id(
         self, payment_options: FiatSubscriptionPaymentOptions
     ) -> tuple[str | None, str | None]:
-        if payment_options.customer_id:
-            return payment_options.customer_id, None
         if not payment_options.customer_email:
-            payment_options.customer_email = "test@lnbits.com"
-            # TODO: Remove the above line and uncomment the
-            # below return statement once we require customer_email for subscriptions.
-            # return (
-            #     None,
-            #     "Revolut subscriptions require customer_id or customer_email.",
-            # )
+            return (
+                None,
+                "Revolut subscriptions require customer_email.",
+            )
 
         customer = await self._get_customer_by_email(payment_options.customer_email)
         customer_id = customer.get("id") if customer else None
diff --git a/tests/unit/test_fiat_providers.py b/tests/unit/test_fiat_providers.py
index 24de541db..176ddefb6 100644
--- a/tests/unit/test_fiat_providers.py
+++ b/tests/unit/test_fiat_providers.py
@@ -876,6 +876,16 @@ async def test_revolut_wallet_create_subscription(settings: Settings):
     wallet = RevolutWallet()
     client = MockHTTPClient(
         [
+            MockHTTPResponse(
+                json_data={
+                    "customers": [
+                        {
+                            "id": "CUSTOMER123",
+                            "email": "customer@example.com",
+                        }
+                    ]
+                }
+            ),
             MockHTTPResponse(
                 json_data={
                     "id": "SUBSCRIPTION123",
@@ -896,7 +906,7 @@ async def test_revolut_wallet_create_subscription(settings: Settings):
         wallet_id="wallet_1",
         memo="Monthly Gold",
         tag="gold",
-        customer_id="CUSTOMER123",
+        customer_email="customer@example.com",
         extra={"link": "link-1"},
         success_url="https://lnbits.example/subscription-success",
     )
@@ -911,11 +921,14 @@ async def test_revolut_wallet_create_subscription(settings: Settings):
         response.checkout_session_url
         == "https://checkout.revolut.com/payment-link/sub_123"
     )
-    assert client.calls[0][0] == "/api/subscriptions"
-    payload = client.calls[0][1]["json"]
+    assert client.calls[0][0] == "/api/customers"
+    assert client.calls[0][1]["params"] == {"limit": 500}
+    assert client.calls[0][1]["timeout"] == 30
+    assert client.calls[1][0] == "/api/subscriptions"
+    payload = client.calls[1][1]["json"]
     assert payload["plan_variation_id"] == "PLAN_VARIATION_123"
     assert payload["customer_id"] == "CUSTOMER123"
-    assert client.calls[0][1]["timeout"] == 30
+    assert client.calls[1][1]["timeout"] == 30
     assert payload["setup_order_redirect_url"] == (
         "https://lnbits.example/subscription-success"
     )
@@ -924,7 +937,7 @@ async def test_revolut_wallet_create_subscription(settings: Settings):
     assert reference["tag"] == "gold"
     assert reference["memo"] == "Monthly Gold"
     assert reference["extra"]["link"] == "link-1"
-    assert client.calls[1][0] == "/api/orders/ORDER123"
+    assert client.calls[2][0] == "/api/orders/ORDER123"
 
 
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