The additional fields I<pkgnum> and I<svcpart> (see L<FS::cust_svc>) should be
defined. An FS::cust_svc record will be created and inserted.
-The additional field I<action> should be set to I<N> for new domains or I<M>
-for transfers.
+The additional field I<action> should be set to I<N> for new domains, I<M>
+for transfers, or I<I> for no action (registered elsewhere).
A registration or transfer email will be submitted unless
$FS::svc_domain::whois_hack is true.