diff --git a/frontend/src/views/Observation.vue b/frontend/src/views/Observation.vue
index bd37ab3..9267e66 100644
--- a/frontend/src/views/Observation.vue
+++ b/frontend/src/views/Observation.vue
@@ -135,6 +135,7 @@
                      title="Enter password to confirm submission"
                      @ok="handleOk"
                      @shown="clearPassword">
+                <b-alert v-if="persons.length === 0" variant="warning" show>No individual names assigned to this observation.</b-alert>
                 <form @submit.stop.prevent="handleSubmit">
                     <b-form-input type="password"
                                   placeholder="Enter password"