diff --git a/common/source_model/src/main/scala/weco/catalogue/source_model/sierra/rules/SierraRulesForRequesting.scala b/common/source_model/src/main/scala/weco/catalogue/source_model/sierra/rules/SierraRulesForRequesting.scala
index 940b2703b1..e88e0337c6 100644
--- a/common/source_model/src/main/scala/weco/catalogue/source_model/sierra/rules/SierraRulesForRequesting.scala
+++ b/common/source_model/src/main/scala/weco/catalogue/source_model/sierra/rules/SierraRulesForRequesting.scala
@@ -72,6 +72,14 @@ object SierraRulesForRequesting {
       case i if i.fixedField("88").contains("g") =>
         NotRequestable.SafeguardedItem("Safeguarded item.")
 
+      // This line covers the case:
+      //
+      // q|i||88||=|j||Deny item request if catalogue record has data issues.
+      //
+      // This rule is intended to deny item requests if a catalogue record has data issues.
+      case i if i.fixedField("88").contains("j") =>
+        NotRequestable.ItemUnavailable()
+
       // These cases cover the lines:
       //
       //    v|i||88||=|b||
diff --git a/common/source_model/src/test/scala/weco/catalogue/source_model/sierra/rules/SierraRulesForRequestingTest.scala b/common/source_model/src/test/scala/weco/catalogue/source_model/sierra/rules/SierraRulesForRequestingTest.scala
index dbace3efac..8c91575f01 100644
--- a/common/source_model/src/test/scala/weco/catalogue/source_model/sierra/rules/SierraRulesForRequestingTest.scala
+++ b/common/source_model/src/test/scala/weco/catalogue/source_model/sierra/rules/SierraRulesForRequestingTest.scala
@@ -19,6 +19,7 @@ class SierraRulesForRequestingTest
       ("s", NotRequestable.ItemOnSearch("This item is on search.")),
       ("x", NotRequestable.ItemWithdrawn("This item is withdrawn.")),
       ("r", NotRequestable.ItemUnavailable("This item is unavailable.")),
+      ("j", NotRequestable.ItemUnavailable("This item is unavailable.")),
       ("z", NotRequestable.NoPublicMessage("fixed field 88 = z")),
       ("v", NotRequestable.AtConservation("This item is with conservation.")),
       ("h", NotRequestable.ItemClosed("This item is closed.")),