diff --git a/app/javascript/submission_form/completed.vue b/app/javascript/submission_form/completed.vue
index fd970c45..00310eb4 100644
--- a/app/javascript/submission_form/completed.vue
+++ b/app/javascript/submission_form/completed.vue
@@ -181,6 +181,10 @@ export default {
         spread: 140
       })
     }
+
+    if (window.decline_button) {
+      window.decline_button.setAttribute('disabled', 'true')
+    }
   },
   methods: {
     sendCopyToEmail () {
diff --git a/app/views/shared/_html_modal.html.erb b/app/views/shared/_html_modal.html.erb
index a966b195..1c104043 100644
--- a/app/views/shared/_html_modal.html.erb
+++ b/app/views/shared/_html_modal.html.erb
@@ -1,5 +1,5 @@
 <% uuid = SecureRandom.uuid %>
-<label for="<%= uuid %>" class="<%= local_assigns[:btn_class] %>"><%= local_assigns[:btn_text] %></label>
+<label id="<%= local_assigns[:button_id] %>" for="<%= uuid %>" class="<%= local_assigns[:btn_class] %>"><%= local_assigns[:btn_text] %></label>
 <input type="checkbox" id="<%= uuid %>" class="modal-toggle">
 <div id="<%= local_assigns[:id] %>" class="modal items-start !animate-none overflow-y-auto">
   <div class="modal-box pt-4 pb-6 px-6 mt-20 max-h-none">
diff --git a/app/views/submit_form/show.html.erb b/app/views/submit_form/show.html.erb
index 38c40361..2a35cb18 100644
--- a/app/views/submit_form/show.html.erb
+++ b/app/views/submit_form/show.html.erb
@@ -16,7 +16,7 @@
           </div>
           <div class="flex items-center space-x-2" style="margin-left: 20px; flex-shrink: 0">
             <div>
-              <%= render 'shared/html_modal', title: t(:decline), btn_text: t(:decline), btn_class: 'btn btn-sm !px-5' do %>
+              <%= render 'shared/html_modal', title: t(:decline), btn_text: t(:decline), btn_class: 'btn btn-sm !px-5', button_id: 'decline_button' do %>
                 <%= render 'submit_form/decline_form', submitter: @submitter %>
               <% end %>
             </div>