why are customer payments unapplied ?

AI generated answer (using internal Slack threads):

Customer payments can become unapplied due to several reasons: 1. Incorrect Payment Application: If the payment is not correctly applied to the respective invoice or bill, it can remain unapplied. This can happen if the payment is mistakenly marked as 'Undeposited Funds' or if the payment is not linked to the correct transaction. 2. Offsetting Journals: If a payment is applied to offsetting journals, a $0 "payment" can be created with no actual record. This can result in the payment becoming unapplied. 3. Unapplied Vendor Payments: If a bill payment is created from a vendor bill and is automatically applied, but then needs to be unapplied for some reason, it can result in an unapplied payment. An unapplied vendor payment is essentially a prepayment. 4. Changes to Applied Transactions: If changes are made to transactions that a payment has been applied to, it can result in the payment becoming unapplied. For example, if you edit a transaction that a payment has been applied to, you may receive a warning that the payment(s) can become unapplied. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******