Certified Mail® for Law Firms
Legal Notices by Certified Mail, Without the Post Office Line.
Law firms use SimpleCertifiedMail.com to prepare service-related and notice mailings, capture Electronic Proof of Acceptance and Return Receipts, and keep matter-ready records for 10 years — with no subscription.
Start Sending — $60 Gets You Going
No subscription · 25M+ pieces sent · BBB Accredited
Does federal procedure require law firms to send documents by Certified Mail?
Not for every defendant. Under Federal Rule of Civil Procedure 4, registered or certified mail is specifically required when serving the United States and certain federal agencies, officers, or employees. Many state rules and statutes also authorize or require Certified Mail for notices and service. Firms should confirm the rule that applies to each matter before mailing.
What the rules actually say
- FRCP Rule 4(i) — serving the United States / agencies / officers by registered or certified mail where the rule requires it.
- 26 U.S.C. § 7502 — timely mailing treated as timely filing.
- 26 CFR § 301.7502-1 — certified mail and prima facie evidence of delivery.
- State civil procedure rules — confirm the statute that governs each notice or service method before you send.
The problem today
Where legal mail slows firms down.
Manual Form 3800 and green cards slow every filing day.
Staff fill forms by hand, meter postage, and chase paper receipts that do not live in the matter file.
Late or lost Return Receipts collide with hard deadlines.
Waiting a week for a green card (or replacing a lost one) creates risk when proof is needed quickly.
Volume turns hours into days.
Preparing hundreds of letters the old way can take roughly five hours for 500 pieces — time that should stay on billable work.
How SimpleCertifiedMail.com supports legal mail workflows
Prepare: Print cover sheets from your desk — no USPS counter forms.
Enter one address or batch-upload from CSV/Excel, print electronic postage on plain paper, fold into free window envelopes, and leave for your carrier or drop in a USPS mailbox.
Prove: Electronic proofs post to your account.
After the first outbound USPS scan, an Electronic Proof of Acceptance PDF is available. When Return Receipt is selected, the Electronic Return Receipt typically posts within 24 hours of delivery.
Retain: Ten years of matter-ready records.
Proofs, tracking, and production cost data stay in your account for reimbursement, audits, or later challenges.
Integrate: Connect mail to your stack.
Use the Certified Mail API to push addresses from practice systems and pull proofs back.
Comply: Map proof to the rule that governs the mailing.
Keep acceptance and delivery records aligned to the procedures your firm already follows, and confirm each matter’s governing rule before you send.
Proof
SimpleCertifiedMail.com LLC is a BBB Accredited business. More than 25 million pieces sent.
Pricing
$60 prefund to start · no monthly fee · free window envelopes
Rates effective July 12, 2026 — see /pricing/ for details.
Frequently asked questions
Can Certified Mail support proof of service?
Certified Mail with Return Receipt produces acceptance and delivery records that many firms keep as part of a service or notice file. Whether those records satisfy proof of service depends on the rule or statute governing your matter, so confirm the applicable requirement before you mail.
Does the FRCP always require Certified Mail?
No. Federal Rule of Civil Procedure 4 specifically contemplates registered or certified mail in certain situations, such as serving the United States and certain federal agencies, officers, or employees. Other defendants may be served by other permitted methods.
Can law firms use Certified Mail for an incarcerated recipient?
Mail to correctional facilities is generally accepted, but facilities have their own handling and signature policies, so delivery records may look different than a typical business address. Check the facility’s rules and the governing procedure before relying on the mailing.
How is Certified Mail different from Priority Mail, Registered Mail, or Priority Mail Express?
Certified Mail is an add-on service that provides mailing evidence and a delivery record, and can be added to First-Class or Priority Mail. Registered Mail adds chain-of-custody handling for high-value items. Priority Mail Express is an expedited delivery service. They solve different problems.
How long are records retained?
Electronic Proof of Acceptance, tracking, Return Receipts, and cost data stay in your account for 10 years.
Is there a subscription?
No. There are no monthly fees, contracts, or maintenance fees — you pay per piece.
What does it cost to start?
A $60 prefund gets you going, and window envelopes are free.
Ready to send your first Certified Mail letter?
No subscription. $60 prefund gets you going. Free window envelopes.
Questions? Call 1-888-462-1750 ext. 1, 9am–5pm ET.