New feature in 8.1.3: Control collection letters at the customer level

You can now set up collection letters at the customer level so that the collection letter code for each transaction is tracked, but the collection letter processing will be based on a single collection letter level that is stored for the customer. The single collection letter will contain all transactions that are overdue for the customer. Because the grace days are now tracked on the customer level, the next collection letter will not be sent until the number of grace days has passed for the next collection letter in the sequence, even though transactions become overdue after the last collection letter was sent. This option reduces the number of collection letters you will send per customer.

You can enable the new feature in Accounts receivable, Setup, Parameters in the Collections tab

The customer will now have additional information available

When you process collection letters, the process will only allow Collection per customer

The different collection letter levels will still be tracked but there will only be a single letter created based on the collection letter sequence

If overdue invoices are paid off, the collection letter sequence will return to the earliest sequence that matches the status of the remaining overdue invoices.

For more information on this features, click on this link:

https://docs.microsoft.com/en-us/dynamics365/unified-operations/financials/accounts-receivable/tasks/process-collection-letters