xml/templates/message_templates/contribution_invoice_receipt_subject.tpl

   1 {if $title}
   2   {if $component}
   3     {if $component == 'event'}
   4       {ts 1=$title}Event Registration Invoice: %1{/ts}
   5     {else}
   6       {ts 1=$title}Contribution Invoice: %1{/ts}
   7     {/if}
   8   {/if}
   9 {else}
  10   {ts}Invoice{/ts}
  11 {/if}
  12  - {contact.display_name}