Letters · Certified Mail · Proof of Delivery
Send letters and certified mail, with proof built in.
Upload a PDF or call the API. We print it, hand it to USPS, and track it to delivery — with certified return receipts and address verification on every send. No printer, no post office, no per-state vendor list.
Prefer to integrate? Read the docs →
- Upload your document notice.pdf
- Acme Corp, 500 Main St, Austin, TX Verified
- Certified + return receipt
Dashboard or API.
Upload a PDF and send in a few clicks, or POST a document and an address. Same pipeline, whichever way you work.
Certified & tracked.
Proof of mailing and proof of delivery on every certified piece — the audit trail regulated businesses need.
Verified addresses.
CASS-certified validation and NCOA on every send, so mail lands instead of bouncing.
One letter or a million.
Send a single notice from the dashboard or a million through the API. Nothing changes but the volume.
How it works
From upload or POST to mailbox, on one pipeline.
The same flow powers a single letter sent from the dashboard and a million sent through the API.
Connect
Create an account, or grab an API key.
Send
Upload your PDF and recipient in the dashboard, or POST them to the API.
We produce & mail
Printed and handed to USPS within one business day.
Track
Real-time status and proof of delivery.
When the mail has to arrive — and you have to prove it.
Rush Mail is built for legal notices, financial disclosures, and regulated communications where delivery and documentation matter. Every certified piece returns a tracking number, electronic return receipt, and timestamped status history.