diff --git a/app/views/shared/_create_account_form.html.erb b/app/views/shared/_create_account_form.html.erb
index 03ca99d..d1ab8da 100644
--- a/app/views/shared/_create_account_form.html.erb
+++ b/app/views/shared/_create_account_form.html.erb
@@ -16,7 +16,7 @@
     <%= render partial: "shared/my_org",
                locals: {f: f, default_org: @default_org,
                         orgs: Org.where("parent_id IS NULL").order("sort_name ASC, name ASC"),
-                        allow_other_orgs: true, required: true} %>
+                        allow_other_orgs: true, required: false} %>
   </div>
 
   <div class="form-group">
diff --git a/app/views/shared/_my_org.html.erb b/app/views/shared/_my_org.html.erb
index 592a778..21a3480 100644
--- a/app/views/shared/_my_org.html.erb
+++ b/app/views/shared/_my_org.html.erb
@@ -11,6 +11,10 @@
                       error: _('Please select an organisation from the list, or click the "My organisation isn\'t listed" link and enter your organisation\'s name.'),
                       required: required} %>
 
+<div id="help-org" class="text-danger" style="display: none">
+  <%= _('Please select an organisation from the list, or click the "My organisation isn\'t listed" link and enter your organisation\'s name.') %>
+</div>
+
 <% if allow_other_orgs %>
   <div class="clearfix"></div>
   <%= f.hidden_field :other_org_id, value: other_org.present? ? other_org.id : '' %>
diff --git a/lib/assets/javascripts/views/shared/create_account_form.js b/lib/assets/javascripts/views/shared/create_account_form.js
index bc703b1..357628e 100644
--- a/lib/assets/javascripts/views/shared/create_account_form.js
+++ b/lib/assets/javascripts/views/shared/create_account_form.js
@@ -4,5 +4,18 @@
 $(() => {
   ariatiseForm({ selector: '#create_account_form' });
   togglisePasswords({ selector: '#create_account_form' });
+
+  $('#create_account_form').on('submit', (e) => {
+    // Additional validation to force the user to choose an org or type something for other
+    const orgId = $('[name="user[org_id]"]');
+    const otherOrg = $('[name="user[other_organisation]"]');
+    if (isValidText(orgId.val()) || isValidText(otherOrg.val())) {
+      $('#help-org').hide();
+    } else {
+      e.preventDefault();
+      $('#help-org').show();
+    }
+  });
+
   initMyOrgCombobox({ selector: '#create-account-form' });
 });