diff --git a/docs/include/interface.update-coupon-rates.json b/docs/include/interface.update-coupon-rates.json
index 7bf71d1..2576b79 100644
--- a/docs/include/interface.update-coupon-rates.json
+++ b/docs/include/interface.update-coupon-rates.json
@@ -33,6 +33,10 @@
     {
       "code": "INVALID_PAST_RATE",
       "message": "Due coupon rates can not be modified"
+    },
+    {
+      "code": "PENDING_COUPON_PAYMENT",
+      "message": "Pending due coupon payment"
     }
   ]
 }
diff --git a/docs/include/interface.update-global-unit-value.json b/docs/include/interface.update-global-unit-value.json
index 01126ec..4eb237b 100644
--- a/docs/include/interface.update-global-unit-value.json
+++ b/docs/include/interface.update-global-unit-value.json
@@ -25,6 +25,10 @@
     {
       "code": "SUSPENDED",
       "message": "Asset operations are suspended"
+    },
+    {
+      "code": "PENDING_COUPON_PAYMENT",
+      "message": "Pending due coupon payment"
     }
   ]
 }
diff --git a/docs/include/interface.update-interest-rate.json b/docs/include/interface.update-interest-rate.json
index b7e8f2f..b07f122 100644
--- a/docs/include/interface.update-interest-rate.json
+++ b/docs/include/interface.update-interest-rate.json
@@ -28,7 +28,7 @@
     },
     {
       "code": "PENDING_COUPON_PAYMENT",
-      "message": "ending due coupon payment"
+      "message": "Pending due coupon payment"
     }
   ]
 }
diff --git a/docs/include/interface.update-time-events.json b/docs/include/interface.update-time-events.json
index 4c9326e..fcce852 100644
--- a/docs/include/interface.update-time-events.json
+++ b/docs/include/interface.update-time-events.json
@@ -41,6 +41,10 @@
     {
       "code": "INVALID_PAST_EVENT",
       "message": "Past time events can not be modified"
+    },
+    {
+      "code": "PENDING_COUPON_PAYMENT",
+      "message": "Pending due coupon payment"
     }
   ]
 }
diff --git a/docs/include/interface.update-time-periods.json b/docs/include/interface.update-time-periods.json
index 4276fd1..87bd533 100644
--- a/docs/include/interface.update-time-periods.json
+++ b/docs/include/interface.update-time-periods.json
@@ -29,6 +29,10 @@
     {
       "code": "INVALID_TIME_PERIOD",
       "message": "Time period durations must be greater than zero"
+    },
+    {
+      "code": "PENDING_COUPON_PAYMENT",
+      "message": "Pending due coupon payment"
     }
   ]
 }
diff --git a/docs/include/interface.update-total-units.json b/docs/include/interface.update-total-units.json
index 531571c..2ab22f4 100644
--- a/docs/include/interface.update-total-units.json
+++ b/docs/include/interface.update-total-units.json
@@ -25,6 +25,10 @@
     {
       "code": "SUSPENDED",
       "message": "Asset operations are suspended"
+    },
+    {
+      "code": "PENDING_COUPON_PAYMENT",
+      "message": "Pending due coupon payment"
     }
   ]
 }
diff --git a/docs/interface-update-coupon-rates.md b/docs/interface-update-coupon-rates.md
index abcbdc8..611b190 100644
--- a/docs/interface-update-coupon-rates.md
+++ b/docs/interface-update-coupon-rates.md
@@ -16,3 +16,6 @@ length of the *coupon rates* is not equal to *total_coupons*.
 
 The call **MUST** fail with the `INVALID_PAST_RATE` error code if a due coupon rate
 is modified.
+
+The call **MUST** fail with the `PENDING_COUPON_PAYMENT` error code if there is
+any due coupon still to be paid.
diff --git a/docs/interface-update-global-unit-value.md b/docs/interface-update-global-unit-value.md
index 59ae3a3..877cb9c 100644
--- a/docs/interface-update-global-unit-value.md
+++ b/docs/interface-update-global-unit-value.md
@@ -10,3 +10,6 @@ caller.
 The call **MUST** fail with the `DEFAULTED` error code if the asset is defaulted.
 
 The call **MAY** fail with the `SUSPENDED` error code if the asset is suspended.
+
+The call **MUST** fail with the `PENDING_COUPON_PAYMENT` error code if there is
+any due coupon still to be paid.
diff --git a/docs/interface-update-time-events.md b/docs/interface-update-time-events.md
index 4ea7a88..fbb6a79 100644
--- a/docs/interface-update-time-events.md
+++ b/docs/interface-update-time-events.md
@@ -22,3 +22,6 @@ are not sorted in strictly ascending order.
 
 The call **MUST** fail with the `INVALID_PAST_EVENT` error code if a past event
 is modified.
+
+The call **MUST** fail with the `PENDING_COUPON_PAYMENT` error code if there is
+any due coupon still to be paid.
diff --git a/docs/interface-update-time-periods.md b/docs/interface-update-time-periods.md
index f4a9317..fa13c6e 100644
--- a/docs/interface-update-time-periods.md
+++ b/docs/interface-update-time-periods.md
@@ -13,3 +13,6 @@ The call **MAY** fail with the `SUSPENDED` error code if the asset is suspended.
 
 The call **MUST** fail with the `INVALID_TIME_PERIOD` error code if the *time period
 durations* are not strictly greater than zero.
+
+The call **MUST** fail with the `PENDING_COUPON_PAYMENT` error code if there is
+any due coupon still to be paid.
diff --git a/docs/interface-update-total-units.md b/docs/interface-update-total-units.md
index e6edd56..3ce4657 100644
--- a/docs/interface-update-total-units.md
+++ b/docs/interface-update-total-units.md
@@ -10,3 +10,6 @@ caller.
 The call **MUST** fail with the `DEFAULTED` error code if the asset is defaulted.
 
 The call **MAY** fail with the `SUSPENDED` error code if the asset is suspended.
+
+The call **MUST** fail with the `PENDING_COUPON_PAYMENT` error code if there is
+any due coupon still to be paid.