Add help text on special invoice requirements.

Change-Id: I11a56870a09b5a8f5cb4536a34644f2c8d3eb6b5
diff --git a/templates/register.htm b/templates/register.htm
index 268979c..7d778ca 100644
--- a/templates/register.htm
+++ b/templates/register.htm
@@ -649,7 +649,10 @@
             <div class="input-group-text fs-3">€</div>
             <input lang="en" name="total_due" id="total_due" class="form-control text-end fw-bold fs-3" readonly>
         </div>
-        <div id="totalHelp" class="form-text fs-4">Please note that bank transfer is the only payment method. After submitting this form, you will be asked to confirm your email address. After that you will receive an invoice with all bank details.</div>
+        <div id="totalHelp" class="form-text fs-5">Please note that bank transfer is the only payment method. After submitting this form, you will be asked to confirm your email address. After that you will receive an invoice with all bank details. Addressee of the invoice will be the Leibniz
+            Institute for the German Language (VAT ID: DE143845359)
+        </div>
+        <div id="specialInvoice" class="form-text fs-5">Please send us an email if you have any special requirements for your invoice. In most cases, the easiest way is to register normally and ignore the automatically generated invoice. We will then issue a revised invoice according to your requirements.</div>
     </div>
 
     <?php endif; ?>