Mail invoices and collection letters online
Small businesses can mail an invoice or past-due notice First-Class for $1.99 — and escalate to a Certified final demand for $12.99 — without a printer, from the browser or straight from their tools via API.
Usually the right pick: First-Class · $1.99, Certified for final demands
A paper invoice still gets paid. Plenty of customers — property managers, older clients, government offices — pay what lands in the physical inbox and let email invoices rot in spam. Mailing the invoice First-Class at $1.99 costs less than the time spent re-sending the PDF a third time.
For receivables, escalate in writing: a friendly First-Class reminder at 15 days, a firmer one at 30, and a Certified final demand ($12.99) at 60 stating the amount, the deadline, and what happens next (collections, small claims, mechanics lien — whatever genuinely applies). The Certified step routinely shakes out payment precisely because it signals you are building a court-ready record.
If you do end up in small claims, the sequence of dated letters is your case: it shows the debt, the demands, and the debtor’s silence. Lawful collection letters are explicitly allowed by screening; what is refused is harassment and threats you cannot lawfully carry out (do not threaten a lien you have no right to file).
Sending more than a few: prepaid credits add up to 35% bonus balance, and the REST endpoint (POST /v1/orders) means your invoicing tool or an agent can drop a letter in the mail when an invoice hits 30 days past due.
Common questions
Is a mailed final demand required before small claims?
Many courts require or strongly expect a written demand first. A Certified demand letter ($12.99) with the amount and a deadline is the standard, and the receipt proves you gave fair notice.
Can I automate past-due letters?
Yes — POST /v1/orders with the letter text and addresses, or wire it through Zapier/n8n/Make webhooks. Each order returns a payment link, or use prepaid credits for hands-off sending.
Are collection letters allowed under your content policy?
Lawful demands for money genuinely owed are explicitly allowed. Impersonating a law firm or collection agency you are not, or threatening action you cannot take, is refused.