diff --git a/src/main/java/org/mskcc/cbio/oncokb/service/SlackService.java b/src/main/java/org/mskcc/cbio/oncokb/service/SlackService.java
index 551f3cfd3..ab24d5788 100644
--- a/src/main/java/org/mskcc/cbio/oncokb/service/SlackService.java
+++ b/src/main/java/org/mskcc/cbio/oncokb/service/SlackService.java
@@ -610,6 +610,13 @@ private List<LayoutBlock> buildAdditionalInfoBlocks(UserDTO userDTO, boolean tri
                     layoutBlocks.add(buildPlainTextBlock(rejectOption.getExpandedNote(), rejectOption.getBlockId()));
             }
         }
+        
+
+        if ((userDTO.getEmail() != null && userDTO.getEmail().endsWith(".ir")) 
+            || (userDTO.getCountry() != null && userDTO.getCountry().toLowerCase().equals("iran"))) 
+        {
+            layoutBlocks.add(buildMarkdownBlock(":nerd_alert: *This user may be from Iran. OncoKB cannot be licensed to users in Iran.*", COUNTRY_WARNING));
+        }
 
         List<UserDTO> potentialDuplicateUsers = userService.getPotentialDuplicateAccountsByUser(userDTO);
         if (!potentialDuplicateUsers.isEmpty()) {
diff --git a/src/main/java/org/mskcc/cbio/oncokb/web/rest/slack/BlockId.java b/src/main/java/org/mskcc/cbio/oncokb/web/rest/slack/BlockId.java
index e92f31490..11d5833fe 100644
--- a/src/main/java/org/mskcc/cbio/oncokb/web/rest/slack/BlockId.java
+++ b/src/main/java/org/mskcc/cbio/oncokb/web/rest/slack/BlockId.java
@@ -26,6 +26,7 @@ public enum BlockId {
     , SUBJECT_INPUT("subject-input")
     , BODY_INPUT("body-input")
     , API_ACCESS("api-access")
+    , COUNTRY_WARNING("country-warning")
     ;
 
     String id;