# Smart Lockbox

- [Can I Apply a Check or Unapplied Payment to Multiple Customer Records?](https://support.paystand.com/hc/en-us/articles/41693366850971-Can-I-Apply-a-Check-or-Unapplied-Payment-to-Multiple-Customer-Records)
- [Manual invoice matching for checks](https://support.paystand.com/hc/en-us/articles/10122029759131-Manual-invoice-matching-for-checks)
- [Payer Instructions](https://support.paystand.com/hc/en-us/articles/10121404560795-Payer-Instructions)
- [Mail Stop Number](https://support.paystand.com/hc/en-us/articles/10120217680539-Mail-Stop-Number)
- [Automatic Invoice Matching](https://support.paystand.com/hc/en-us/articles/10119912873115-Automatic-Invoice-Matching)