=item replace OLD_RECORD
-Modifying a refund? Well, don't say I didn't warn you.
+You can, but probably shouldn't modify refunds...
+
+Replaces the OLD_RECORD with this one in the database, or, if OLD_RECORD is not
+supplied, replaces this record. If there is an error, returns the error,
+otherwise returns false.
=cut
sub replace {
my $self = shift;
+ return "Can't modify closed refund" if $self->closed =~ /^Y/i;
$self->SUPER::replace(@_);
}