I'm looking at the options on how to best write-off customer refunds and un-charged vendor payments that are past 180 days old. I know we can void the refund check/payment and issue a credit memo, or create journal entry to credit the balance to Other Income. Are there any other best or preferred practices on how to process these in NetSuite?

Hey, off top of my head journal entry is the preferred route, hopefully these links give guidance: https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/bridgehead_N1481347.html https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_N1481280.html https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/bridgehead_4279824892.html