+=item invoicing_list_emailonly_scalar
+
+Returns the list of email invoice recipients (invoicing_list without non-email
+destinations such as POST and FAX) as a comma-separated scalar.
+
+=cut
+
+sub invoicing_list_emailonly_scalar {
+ my $self = shift;
+ warn "$me invoicing_list_emailonly_scalar called"
+ if $DEBUG;
+ join(', ', $self->invoicing_list_emailonly);
+}
+