diff --git a/.changeset/afraid-pigs-confess.md b/.changeset/afraid-pigs-confess.md
new file mode 100644
index 00000000..690b1a42
--- /dev/null
+++ b/.changeset/afraid-pigs-confess.md
@@ -0,0 +1,5 @@
+---
+"@rebilly/client-php": patch
+---
+
+feat(api-definitions): Add orderDelinquencyPeriod to Organization settings. Rebilly/rebilly#7016
diff --git a/src/Model/OrganizationSettingsBilling.php b/src/Model/OrganizationSettingsBilling.php
index b3c0333b..228399a0 100644
--- a/src/Model/OrganizationSettingsBilling.php
+++ b/src/Model/OrganizationSettingsBilling.php
@@ -24,6 +24,9 @@ public function __construct(array $data = [])
         if (array_key_exists('pendingOrderTtl', $data)) {
             $this->setPendingOrderTtl($data['pendingOrderTtl']);
         }
+        if (array_key_exists('orderDelinquencyPeriod', $data)) {
+            $this->setOrderDelinquencyPeriod($data['orderDelinquencyPeriod']);
+        }
     }
 
     public static function from(array $data = []): self
@@ -43,12 +46,27 @@ public function setPendingOrderTtl(null|string $pendingOrderTtl): static
         return $this;
     }
 
+    public function getOrderDelinquencyPeriod(): ?string
+    {
+        return $this->fields['orderDelinquencyPeriod'] ?? null;
+    }
+
+    public function setOrderDelinquencyPeriod(null|string $orderDelinquencyPeriod): static
+    {
+        $this->fields['orderDelinquencyPeriod'] = $orderDelinquencyPeriod;
+
+        return $this;
+    }
+
     public function jsonSerialize(): array
     {
         $data = [];
         if (array_key_exists('pendingOrderTtl', $this->fields)) {
             $data['pendingOrderTtl'] = $this->fields['pendingOrderTtl'];
         }
+        if (array_key_exists('orderDelinquencyPeriod', $this->fields)) {
+            $data['orderDelinquencyPeriod'] = $this->fields['orderDelinquencyPeriod'];
+        }
 
         return $data;
     }