What to include
A useful letter identifies the sender, customer or account reference, overdue amount, relevant due date, payment instructions, and an accessible inquiry route.
Use verified account information and clear language. Provide only information appropriate for the recipient and delivery channel.
Check the account before sending
Confirm recent payments, approved credits, disputes, contact preferences, and legal restrictions. A paid invoice should not receive another demand because a collection queue has stale data.
Where the obligation is disputed, route the issue for appropriate handling rather than automatically increasing urgency.
Not every letter has the same legal function
A routine reminder is not automatically a debt validation notice, a statutory pre-action notice, or a court document. Requirements depend on the account, collector, jurisdiction, and communication.
Covered U.S. debt collectors must follow applicable validation and dispute rules. See the CFPB's validation information guidance.
Do not label a routine reminder as a legal notice or threaten an action unless the representation is accurate and permitted.
Cadence is a policy decision
There is no universal six-letter rule or 30-90-day schedule. Choose an approved approach that reflects the account and applicable restrictions, and stop or change it when new information requires review.
Keep the sent version, date, destination, and response. Measure resolved issues and verified payments rather than assuming that more letters mean better recovery.
Related terms: Unpaid Invoices, Outstanding Balance, and Escalation.