+=item payinfo_used [ PAYINFO ]
+
+Returns 1 if there's an existing payment using this payinfo. This can be
+used to set the 'recurring payment' flag required by some processors.
+
+=cut
+
+sub payinfo_used {
+ my $self = shift;
+ my $payinfo = shift || $self->payinfo;
+ my %hash = (
+ 'custnum' => $self->custnum,
+ 'payby' => 'CARD',
+ );
+
+ return 1
+ if qsearch('cust_pay', { %hash, 'payinfo' => $payinfo } )
+ || qsearch('cust_pay',
+ { %hash, 'paymask' => $self->mask_payinfo('CARD', $payinfo) } )
+ ;
+
+ return 0;
+}
+