diff --git a/project/static/vue/common/typeahead.vue.js b/project/static/vue/common/typeahead.vue.js
index 4e72d1e..c030369 100644
--- a/project/static/vue/common/typeahead.vue.js
+++ b/project/static/vue/common/typeahead.vue.js
@@ -67,7 +67,7 @@ const CustomTypeahead = {
               vm.suggestions = response.data.items
           })
     },
-    fetchDataDebounced: _.debounce(function(query) { this.fetchData(query) }, 200),
+    fetchDataDebounced: _.debounce(function(query) { this.fetchData(query) }, 1000),
     onInput() {
       this.selected = null;
       this.fetchDataDebounced(this.query)
diff --git a/project/static/vue/organization-organization-invitations/create.vue.js b/project/static/vue/organization-organization-invitations/create.vue.js
index dde6129..75cbd5a 100644
--- a/project/static/vue/organization-organization-invitations/create.vue.js
+++ b/project/static/vue/organization-organization-invitations/create.vue.js
@@ -16,7 +16,8 @@ const OrganizationOrganizationInvitationCreate = {
                 :label="$t('shared.models.adminUnitInvitation.organizationName')"
                 name="organizationName"
                 v-model="form.organization_name"
-                rules="required" />
+                rules="required|uniqueOrganizationName"
+                :debounce="1000" />
               <validated-switch
                 v-if="adminUnit.can_verify_other"
                 :label="$t('shared.models.adminUnitInvitation.relationVerify')"
diff --git a/project/static/vue/organization-organization-invitations/update.vue.js b/project/static/vue/organization-organization-invitations/update.vue.js
index 434e996..b1b046c 100644
--- a/project/static/vue/organization-organization-invitations/update.vue.js
+++ b/project/static/vue/organization-organization-invitations/update.vue.js
@@ -11,7 +11,8 @@ const OrganizationOrganizationInvitationUpdate = {
                 :label="$t('shared.models.adminUnitInvitation.organizationName')"
                 name="organizationName"
                 v-model="form.organization_name"
-                rules="required" />
+                rules="required|uniqueOrganizationName"
+                :debounce="1000" />
               <validated-switch
                 v-if="adminUnit.can_verify_other"
                 :label="$t('shared.models.adminUnitInvitation.relationVerify')"
diff --git a/project/templates/layout_vue.html b/project/templates/layout_vue.html
index 7917ab9..f78a2ec 100644
--- a/project/templates/layout_vue.html
+++ b/project/templates/layout_vue.html
@@ -125,6 +125,7 @@
           required: "The {_field_} field is required",
           size: "The {_field_} field size must be less than {size}KB",
           double: "The {_field_} field must be a valid decimal",
+          uniqueOrganizationName: "Name is already taken",
         },
       },
     },
@@ -203,6 +204,7 @@
           required_if: "{_field_} ist ein Pflichtfeld",
           size: "{_field_} muss kleiner als {size}KB sein",
           double: "Das Feld {_field_} muss eine gültige Dezimalzahl sein",
+          uniqueOrganizationName: "Der Name ist bereits vergeben",
         },
       },
     },
@@ -223,6 +225,23 @@
     VeeValidate.extend(rule, VeeValidate.Rules[rule]);
   });
 
+  VeeValidate.extend('uniqueOrganizationName', {
+    validate: async value => {
+      try {
+        const response = await axios.get(
+          `/api/v1/organizations?keyword=${value}`, {
+            withCredentials: true,
+          }
+        );
+        return !response.data.items.some(o => o.name == value);
+      } catch (err) {
+        return true;
+      }
+    }
+  }, {
+    immediate: false
+  });
+
   {% block vue_routes %}
   {% endblock %}