Final answer:
The most useful report for calling past due customers is an aged receivables report, which lists unpaid balances by delinquency period, helping prioritize calls and understand cash flow.
Step-by-step explanation:
The most useful report for a company calling each past due customer every month would likely be an aged receivables report or an overdue payments report. This report typically lists all customers who have unpaid balances, organized by the length of time the invoice has been outstanding (delinquency periods). It allows the business to prioritize their calls based on how long the bills have been unpaid and how much each customer owes, including any late fees or additional charges.
An aged receivables report also assists the company in understanding its cash flow situation by showing the amount of money tied up in unpaid invoices and potentially identifying trends or patterns in late payments among the customer base.