When you delete a record in NetSuite, the following will happen in Kolleno:
CUSTOMER: the name has the text "[DELETED]" appended to the end and the customer is marked as paused chasing.
CONTACT: it is marked as inactive and, if it is assigned to specific invoices, that relationship is deleted.
INVOICE: it gets marked as CLOSED.
PAYMENT: it is marked as VOIDED.
CREDIT MEMO/CREDIT NOTE: it is marked as VOIDED.