diff --git a/swh/web/assets/src/bundles/browse/origin-search.js b/swh/web/assets/src/bundles/browse/origin-search.js
--- a/swh/web/assets/src/bundles/browse/origin-search.js
+++ b/swh/web/assets/src/bundles/browse/origin-search.js
@@ -5,7 +5,7 @@
  * See top-level LICENSE file for more information
  */
 
-import {handleFetchError} from 'utils/functions';
+import { handleFetchError } from 'utils/functions';
 
 const limit = 100;
 let linksPrev = [];
@@ -186,8 +186,17 @@
       if (searchMetadata) {
         queryParameters += '&search_metadata';
       }
-      // Update the url, triggering page reload and effective search
-      window.location.search = queryParameters;
+
+      let searchQueryTextSplitted = searchQueryText.split(':');
+      if (searchQueryTextSplitted.length === 4 && searchQueryTextSplitted[0].toLowerCase() !== 'swh') {
+        $('#swh-origin-search-results').hide();
+        $('.swh-search-pagination').hide();
+        $('#swh-no-result').text('This is not a valid PID');
+        $('#swh-no-result').show();
+      } else {
+        // Update the url, triggering page reload and effective search
+        window.location.search = queryParameters;
+      }
     });
 
     $('#origins-next-results-button').click(event => {