diff --git a/modules/charon-core/src/main/java/org/wso2/charon3/core/protocol/endpoints/GroupResourceManager.java b/modules/charon-core/src/main/java/org/wso2/charon3/core/protocol/endpoints/GroupResourceManager.java
index 45531da5c..469353b2c 100644
--- a/modules/charon-core/src/main/java/org/wso2/charon3/core/protocol/endpoints/GroupResourceManager.java
+++ b/modules/charon-core/src/main/java/org/wso2/charon3/core/protocol/endpoints/GroupResourceManager.java
@@ -932,7 +932,7 @@ private void processValueAttributeOfOperation(SCIMResourceTypeSchema schema, Pat
     }
 
     private List<Map<String, String>> transformMembersAttributeToMap(MultiValuedAttribute multiValuedMembersAttribute)
-            throws CharonException {
+            throws CharonException, BadRequestException {
 
         List<Map<String, String>> memberList = new ArrayList<>();
         List<Attribute> subValuesList = multiValuedMembersAttribute.getAttributeValues();
@@ -940,6 +940,22 @@ private List<Map<String, String>> transformMembersAttributeToMap(MultiValuedAttr
             ComplexAttribute complexAttribute = (ComplexAttribute) subValue;
             Map<String, Attribute> subAttributesList = complexAttribute.getSubAttributesList();
 
+            // Check if `value` (member id) attribute is present and not empty.
+            if (!subAttributesList.containsKey(SCIMConstants.CommonSchemaConstants.VALUE)) {
+                throw new BadRequestException(ResponseCodeConstants.DESC_BAD_REQUEST,
+                        ResponseCodeConstants.INVALID_SYNTAX);
+            } else if (((SimpleAttribute)
+                    (subAttributesList.get(SCIMConstants.CommonSchemaConstants.VALUE))).getStringValue().isEmpty()) {
+                throw new BadRequestException(ResponseCodeConstants.DESC_BAD_REQUEST,
+                        ResponseCodeConstants.INVALID_VALUE);
+            }
+
+            // Check if `display` value is present.
+            if (!subAttributesList.containsKey(SCIMConstants.CommonSchemaConstants.DISPLAY)) {
+                throw new BadRequestException(ResponseCodeConstants.DESC_BAD_REQUEST,
+                        ResponseCodeConstants.INVALID_SYNTAX);
+            }
+
             Map<String, String> member = new HashMap<>();
             member.put(SCIMConstants.CommonSchemaConstants.VALUE, ((SimpleAttribute)
                     (subAttributesList.get(SCIMConstants.CommonSchemaConstants.VALUE))).getStringValue());