The aqbasket invoice number is not the one populated on receipt
as the order line invoice number is the field used elsewhere
suppress the unpopulated field from the basket display
<p>Managed by: <!-- TMPL_VAR NAME="authorisedbyname" --></p>
<p>Open on: <!-- TMPL_VAR NAME="creationdate" --></p>
<p>For vendor ID: <!-- TMPL_VAR NAME="booksellerid" --></p>
- <p>Invoice number: <!-- TMPL_VAR NAME="booksellerinvoicenumber" --></p>
<!-- TMPL_IF name="closedate" --><p>Closed On: <!-- TMPL_VAR name="closedate" --></p><!-- /TMPL_IF -->
<!-- TMPL_UNLESS name="closedate" -->
<p><a href="javascript:confirm_close()" class="button">Close this basket</a></p>