diff --git a/openapi/components/requestBodies/Webhooks/SubscriptionWebhook.yaml b/openapi/components/requestBodies/Webhooks/SubscriptionWebhook.yaml
index 522e7ad0df..1ae9b2176f 100644
--- a/openapi/components/requestBodies/Webhooks/SubscriptionWebhook.yaml
+++ b/openapi/components/requestBodies/Webhooks/SubscriptionWebhook.yaml
@@ -25,6 +25,7 @@ content:
             - subscription-trial-end-reminder
             - subscription-trial-ended
             - subscription-upgraded
+            - order-delinquency-reached
         _embedded:
           type: object
           description: Embedded objects.
diff --git a/openapi/components/schemas/EventType.yaml b/openapi/components/schemas/EventType.yaml
index 47d88e7773..acd79c62e1 100644
--- a/openapi/components/schemas/EventType.yaml
+++ b/openapi/components/schemas/EventType.yaml
@@ -83,3 +83,4 @@ enum:
   - transaction-discrepancy-found
   - transaction-process-requested
   - transaction-processed
+  - order-delinquency-reached
diff --git a/openapi/components/schemas/GlobalEventType.yaml b/openapi/components/schemas/GlobalEventType.yaml
index 2d58f03e20..4ae3e76053 100644
--- a/openapi/components/schemas/GlobalEventType.yaml
+++ b/openapi/components/schemas/GlobalEventType.yaml
@@ -100,3 +100,4 @@ enum:
   - transaction-reconciled
   - transaction-timeout-resolved
   - waiting-gateway-transaction-completed
+  - order-delinquency-reached
diff --git a/openapi/components/schemas/Subscription.yaml b/openapi/components/schemas/Subscription.yaml
index e663878155..2302524a5e 100644
--- a/openapi/components/schemas/Subscription.yaml
+++ b/openapi/components/schemas/Subscription.yaml
@@ -333,6 +333,16 @@ properties:
       If this value is not passed during order creation,
       a [pending order TTL](https://all-rebilly.redoc.ly/tag/Organizations/operation/PatchOrganization/#!path=settings/billing/pendingOrderTtl&t=request) setting is used to calculate the value.
     format: date-time
+  delinquencyPeriod:
+    type:
+      - 'string'
+      - 'null'
+    description: |-
+      Length of time, in ISO-8601 durations format,
+      before which an order with an invoice in past the due state is automatically canceled.
+      If the provided value is `null`, the order does not change state.
+    example: P7D
+    default: null
   couponIds:
     type:
       - 'array'
diff --git a/openapi/openapi.yaml b/openapi/openapi.yaml
index 92ad11c28f..b7be7e8a19 100644
--- a/openapi/openapi.yaml
+++ b/openapi/openapi.yaml
@@ -1564,3 +1564,6 @@ webhooks:
   data-export-completed:
     post:
       $ref: ./webhooks/data-export-completed.yaml
+  order-delinquency-reached:
+    post:
+      $ref: ./webhooks/order-delinquency-reached.yaml
diff --git a/openapi/webhooks/order-delinquency-reached.yaml b/openapi/webhooks/order-delinquency-reached.yaml
new file mode 100644
index 0000000000..37bc23a79d
--- /dev/null
+++ b/openapi/webhooks/order-delinquency-reached.yaml
@@ -0,0 +1,11 @@
+summary: Order delinquency time reached
+operationId: order-delinquency-reached
+x-products:
+  - Core
+tags:
+  - Orders
+requestBody:
+  $ref: ../components/requestBodies/Webhooks/SubscriptionWebhook.yaml
+responses:
+  '2xx':
+    description: Returns any 2xx status to indicate that data is received.