diff --git a/src/main/resources/templates/confirmation/person.html b/src/main/resources/templates/confirmation/person.html
index 6b15782..f5985dc 100644
--- a/src/main/resources/templates/confirmation/person.html
+++ b/src/main/resources/templates/confirmation/person.html
@@ -8,7 +8,7 @@
   <th:block layout:fragment="content">
     <div class="mainpage">
       <div class="container" style="max-width: 100%" sec:authorize="hasRole('registrator')">
-        <form action="#" th:action="@{/confirmation/person/update}" th:object="${person}" method="post" th:if="${person != null}">
+        <form id="form" action="#" th:action="@{/confirmation/person/update}" th:object="${person}" method="post" th:if="${person != null}">
           <div class="row mb-2">
             <label for="outputPk" class="col-sm-2 col-form-label">ID</label>
             <div class="col-sm-10">
@@ -132,7 +132,7 @@
           <div class="row mb-2">
             <label for="inputAccept" class="col-sm-2 col-form-label"></label>
             <div class="col-sm-10">
-              <button type="submit" class="btn btn-primary" onclick="progress.start()">Ok</button>
+              <button type="submit" class="btn btn-primary" onclick="progress.start()" th:if="${person.progress} != 'revoked'">Ok</button>
               <a th:href="@{/confirmation}" class="btn btn-secondary">Abbrechen</a>
             </div>
           </div>
@@ -160,6 +160,17 @@
         <div th:if="${person == null}" class="error">In der Datenbank wurde keine Person mit entsprechender ID gefunden.</div>
       </div>
     </div>
-  </th:block>
+		<script type="text/javascript">
+		  /**
+		   * forbid enter in form to allow disabling the ok button for revoked bookings
+		   */
+			$(document).on('keyup keypress', 'form', function(e) {
+				if (e.keyCode == 13) {
+					e.preventDefault();
+					return false;
+				}
+			});
+		</script>
+	</th:block>
 </body>
 </html>