diff --git a/openapi/api.yaml b/openapi/api.yaml
index 98b181b8..b59534f3 100644
--- a/openapi/api.yaml
+++ b/openapi/api.yaml
@@ -35526,6 +35526,12 @@ components:
           description: If there are pending credits on the account that will be invoiced
             during the subscription creation, these will be used as the Customer Notes
             on the credit invoice.
+        vat_reverse_charge_notes:
+          type: string
+          title: VAT reverse charge notes
+          description: This will default to the VAT reverse charge notes text specified
+            on the Invoice Settings. Specify custom notes to add or override VAT reverse
+            charge notes. Custom notes will stay with a subscription on all renewals.
         po_number:
           type: string
           title: Purchase order number
@@ -35699,6 +35705,21 @@ components:
             "$ref": "#/components/schemas/SubscriptionRampInterval"
         credit_application_policy:
           "$ref": "#/components/schemas/CreditApplicationPolicy"
+        terms_and_conditions:
+          type: string
+          title: Terms and conditions
+          description: Specify custom notes to add or override Terms and Conditions.
+            Custom notes will stay with a subscription on all renewals.
+        customer_notes:
+          type: string
+          title: Customer notes
+          description: Specify custom notes to add or override Customer Notes. Custom
+            notes will stay with a subscription on all renewals.
+        vat_reverse_charge_notes:
+          type: string
+          title: VAT reverse charge notes
+          description: Specify custom notes to add or override VAT reverse charge
+            notes. Custom notes will stay with a subscription on all renewals.
         bulk:
           type: boolean
           description: Optional field to be used only when needing to bypass the 60
@@ -35755,6 +35776,11 @@ components:
           title: Customer notes
           description: Specify custom notes to add or override Customer Notes. Custom
             notes will stay with a subscription on all renewals.
+        vat_reverse_charge_notes:
+          type: string
+          title: VAT reverse charge notes
+          description: Specify custom notes to add or override VAT reverse charge
+            notes. Custom notes will stay with a subscription on all renewals.
         po_number:
           type: string
           title: Purchase order number
@@ -37407,6 +37433,23 @@ components:
           format: date-time
           description: Last updated at
           readOnly: true
+    ExternalProductMini:
+      type: object
+      title: External product mini details
+      description: Just the important parts.
+      properties:
+        id:
+          type: string
+          title: External product ID
+          readOnly: true
+        object:
+          type: string
+          title: Object type
+          readOnly: true
+        name:
+          type: string
+          title: Name
+          description: The merchant-facing name of the external product.
     ExternalProductReferenceMini:
       type: object
       title: External Product Reference details
@@ -37469,6 +37512,10 @@ components:
           "$ref": "#/components/schemas/AccountMini"
         external_product_reference:
           "$ref": "#/components/schemas/ExternalProductReferenceMini"
+        external_product:
+          "$ref": "#/components/schemas/ExternalProductMini"
+        plan:
+          "$ref": "#/components/schemas/PlanMini"
         external_payment_phases:
           type: array
           title: External payment phases
diff --git a/recurly/resources.py b/recurly/resources.py
index aca69db9..6cb2964a 100644
--- a/recurly/resources.py
+++ b/recurly/resources.py
@@ -1421,6 +1421,8 @@ class ExternalSubscription(Resource):
         The id of the subscription in the external systems., I.e. Apple App Store or Google Play Store.
     external_payment_phases : :obj:`list` of :obj:`ExternalPaymentPhase`
         The phases of the external subscription payment lifecycle.
+    external_product : ExternalProductMini
+        Just the important parts.
     external_product_reference : ExternalProductReferenceMini
         External Product Reference details
     id : str
@@ -1433,6 +1435,8 @@ class ExternalSubscription(Resource):
         When a new billing event occurred on the external subscription in conjunction with a recent billing period, reactivation or upgrade/downgrade.
     object : str
         Object type
+    plan : PlanMini
+        Just the important parts.
     quantity : int
         An indication of the quantity of a subscribed item's quantity.
     state : str
@@ -1459,12 +1463,14 @@ class ExternalSubscription(Resource):
         "expires_at": datetime,
         "external_id": str,
         "external_payment_phases": ["ExternalPaymentPhase"],
+        "external_product": "ExternalProductMini",
         "external_product_reference": "ExternalProductReferenceMini",
         "id": str,
         "imported": bool,
         "in_grace_period": bool,
         "last_purchased": datetime,
         "object": str,
+        "plan": "PlanMini",
         "quantity": int,
         "state": str,
         "test": bool,
@@ -1503,6 +1509,25 @@ class ExternalProductReferenceMini(Resource):
     }
 
 
+class ExternalProductMini(Resource):
+    """
+    Attributes
+    ----------
+    id : str
+        External product ID
+    name : str
+        The merchant-facing name of the external product.
+    object : str
+        Object type
+    """
+
+    schema = {
+        "id": str,
+        "name": str,
+        "object": str,
+    }
+
+
 class ExternalPaymentPhase(Resource):
     """
     Attributes