Terms of Service

Effective date: October 26, 2026

Certified Mail Sender (certifiedmailsender.com) is operated by Legitimate LLC, a Georgia limited liability company ("we", "us"). These terms cover your use of certifiedmailsender.com, our API, our MCP server and our account pages (together, the "Service"). They include our Refund policy, our Acceptable use policy and our Privacy policy.

By using the Service, you agree to these terms. If you use it for a company, you confirm you can bind that company. You must be at least 18.

If an AI agent or other software uses the Service for you, you are the sender. You are responsible for what it sends, approves or pays for under these terms.

1. What the Service does

We print your letter and mail it by USPS Certified Mail, with an optional electronic Return Receipt (eRR). You upload a PDF or send text we typeset. You see an exact preview and a price. You approve and pay. Then a printing partner prints, stuffs and mails the letter. We show you the status, USPS tracking and, when it exists, the eRR.

We mail US domestic letters of 1 to 10 pages. A PDF can be up to 10 MB.

We are not the Postal Service. Certified Mail Sender is operated by Legitimate LLC and is not affiliated with, endorsed by or sponsored by the United States Postal Service. USPS and Certified Mail are trademarks of the United States Postal Service. USPS delivers the mail. We don't.

We are not a law firm and give no legal advice. We don't tell you whether Certified Mail, or an eRR, satisfies a law, a court rule, a contract or an agency rule. USPS says of its own electronic Return Receipt that "its legal status is not determined by the Postal Service. That decision is made by the individual courts." The same goes for what we produce. Check the rule that applies to your notice, or ask a lawyer.

2. Accounts, API keys and links

You can create a first letter without an account. Each letter has a private link. Anyone who has the link can see the letter, approve it until it is paid, and cancel it until it goes to print. Keep it private.
An account is an email address. You sign in with a link we email you. The link works once and expires in 15 minutes.
You can make API keys in your account. You are responsible for everything done with your keys. Revoke a key at once if it leaks. Tell us at support@certifiedmailsender.com if you think your account has been compromised.
Auto-send. You can turn on auto-send for a key. Letters made with that key are paid from your prepaid balance and mailed without an approval step. When you turn it on, you confirm the statement in section 3 for every letter that key sends. Turn it on only for an agent you trust to send mail for you. If we can't pay or mail an auto-send letter (for example, the balance is short), we stop auto-send for that letter, say why on its page, and leave it waiting for your approval.
Test mode. Test keys and test letters never mail anything. Test balances are not money and can't be refunded.

3. Your letter is your responsibility

You are responsible for the content of every letter and for your right to send it. Before we take payment, you confirm this statement (or, for auto-send, when you turn it on for a key):

I am the sender or authorized to send for them, the return address is theirs, and I have the right to send this letter.

You also agree that:

The return address is yours, or you are authorized to use it.
Your letter follows our Acceptable use policy and the law.
The recipient's name and address are correct. We check the address with USPS data before you pay and show you any correction. We can't promise the address is right for the person you mean.
Your letter is mailable under the USPS Domestic Mail Manual. You agree to comply with all applicable postal standards. If the Manual conflicts with information on a Click2Mail or Certified Mail Sender page, the Manual controls.
You have the right to give us the personal information of the people named in the letter.

We mail exactly the PDF you approved. If you find a mistake after you approve, we can't change it. Anything you change needs a new letter and a new approval.

You give us permission to store, process, print and mail your letter; to read it with automated tools and our staff for screening and abuse review (section 5); and to pass it to our printing partner and USPS to do the job. We use it for nothing else. See our Privacy policy.

4. Price, approval and payment

Price rule. Our price is our cost plus 10%. Card fees come out of our share, not on top of your price.
Line items. Every quote shows three lines: "USPS postage and Certified Mail fees" (at exact cost), "Printing, envelope and handling" (our printing partner's price) and "Certified Mail Sender service fee".
Examples (one page). $9.04 for Certified Mail. $12.24 with eRR. Longer letters cost more. Your quote shows the total before you pay. Prices change when our costs change. The price you approve is the price you pay.
Approval. Your approval covers the exact PDF, the recipient, the sender, the service and the total shown. If anything changes, you get a new draft that needs a new approval.
Payment. Card payments go through Stripe. We never see or store your card number. You can also pay from a prepaid balance (section 7).
Tax. The total on your quote is what you pay. If sales tax applies to your order, we show it before you pay.
Georgia. We can't take orders from Georgia yet. See section 8.

5. Screening and review

We check every letter before it is printed. The checks look at the sender, the history of the sender and recipient, and the content. Part of the check is an automated model that reads the text of your letter (see our Privacy policy). A person reviews anything that is held.

We may hold a letter for review. We may ask you to change it, refuse it, or stop it. Screening and review are our protection, not a legal review. A letter that passes isn't approved by us or checked for legal accuracy.
Pages that are images or scans have no text we can read. A person reads those letters first. That can add up to a day. We tell you before you pay.
24-hour limit. If we haven't finished reviewing a held letter within 24 hours, we stop it before printing and refund your payment in full.
If we reject a letter, we refund your payment in full. We may tell you why. We may not, if telling you would help someone get around our checks.
Firm, hostile or unwelcome letters from a real sender are allowed. See the Acceptable use policy for what we hold.
The automated check can be wrong in both directions. We decide in the end whether to mail a letter.
We may limit how many letters an account can send. The limits for new senders are in the Acceptable use policy.

6. After we mail it

Cancel. You can cancel a letter until it goes to our printing partner: with the "Cancel this letter" button on its page, with the API or MCP tool cancel_letter, or by writing to support. After you pay, we wait 30 minutes before sending it to our printing partner, unless you choose to send it right away. A held letter can be canceled until it is released. A canceled letter is refunded in full. After it goes to the partner we can't recall it.
Delivery. USPS handles delivery. We don't promise a delivery date, delivery at all, or a signature. A recipient may refuse or not claim a letter. We show USPS tracking when USPS accepts the letter.
Proof. For each letter we show a timeline, the USPS tracking number and a copy of what was mailed. With eRR, we attach the electronic Return Receipt when USPS provides it. If it never comes, the Refund policy says what we refund.
USPS records. USPS keeps eRR records for two years from the date of mailing (USPS FAQ, "What is Electronic Return Receipt"). We keep your copy under our Privacy policy.
Problems with USPS. A lost, late, damaged or misdelivered letter is a claim to make with USPS. See the Refund policy.

7. Prepaid balance

You can add money to a prepaid balance to pay for letters and for auto-send. A top-up is from $20 to $500, in whole dollars. Test and live balances are separate.
Letters paid from the balance take the amount from it. If such a letter is refunded, the money goes back to your balance.
Refund of unused balance. You can ask for the unused part of your balance back, at any time, at support@certifiedmailsender.com. We refund it to the card or cards you topped up with, starting with the most recent top-up. Money already spent on a letter that was mailed is not refunded.
A balance is not a bank account. It earns no interest, and it doesn't expire. We hold it only to pay for letters.
Balances are not available for Georgia billing addresses yet. If you top up with a Georgia billing address, we refund the whole top-up.
A blocked account can't top up or pay from a balance. We still refund its unused balance on request.

8. Georgia

We can't serve Georgia addresses yet. For now:

If your return address is in Georgia, we won't create the letter.
If you pay with a Georgia billing address, we refund you in full and we don't mail the letter.
If you top up with a Georgia billing address, we refund the top-up in full.

You can send mail to a recipient in Georgia. The limit is about the sender's return address and the billing address. Watch certifiedmailsender.com for when this changes.

9. Refunds

The Refund policy is part of these terms. In short:

We refund in full if we don't mail your letter.
We don't refund after USPS has accepted the letter.
A USPS service failure is a claim to make with USPS.
Unused prepaid balance is refundable on request.

10. Acceptable use

You agree to follow the Acceptable use policy. We may refuse any letter, and suspend or block any account or sender, that breaks it.

11. Our printing partner's terms (Click2Mail)

C2M LLC d/b/a Click2Mail prints and mails your letter. Click2Mail requires us to pass its API terms on to our customers. The full text is in Appendix A. In plain words, these parts reach you:

You may use the Service only to facilitate Click2Mail transactions: that is, to send mail through us.
You must not use the Service, or Click2Mail's name or data, in a way that implies Click2Mail endorses or sponsors you or your products.
You must not harm the performance of Click2Mail's servers.
You must not post or send material that violates a third party's rights, or that has a virus or other harmful component.
You must give accurate information when you register.
You must follow postal standards, including the USPS Domestic Mail Manual.
Click2Mail's interfaces and materials come "as is", without warranties. Click2Mail disclaims all liability to users for the interfaces.
Click2Mail's terms say users indemnify Click2Mail for claims related to the operation of the user's website in conjunction with Click2Mail's interface.
Click2Mail's terms are governed by Virginia law. These Terms of Service are governed by Georgia law (section 15).

If Appendix A and this section differ, Appendix A controls for the Click2Mail terms.

12. No warranty, and limits on what we owe you

To the fullest extent the law allows, the Service is provided "as is". We don't promise that it will always be available or free of errors, that a letter will be delivered by a given date, or that a letter, tracking or eRR will satisfy any legal requirement.

We are not liable for indirect, incidental, special or consequential damages. That includes a missed deadline, a lost legal right, lost profits or the outcome of a dispute or court case that involves your letter.

Our total liability to you for all claims about the Service is limited to the greater of (a) the amount you paid us in the 12 months before the claim and (b) $100.

Nothing here limits liability that can't be limited by law. Some places don't allow some of these limits. In those places, the limit applies as far as the law allows.

13. Your promises to us (indemnity)

You will defend and hold harmless Legitimate LLC from claims, losses and costs (including reasonable legal fees) that arise from your letters, your breach of these terms or the law, or your use of the Service. This includes claims by recipients and by our printing partner.

14. Suspension and ending

You can stop using the Service at any time. You can ask us to close your account and to refund your unused balance.

We may refuse a letter, or suspend or block an account, a payment card, an email address, a recipient or a sender-to-recipient pair, if we reasonably think it breaks these terms or the law, or if the law or a partner requires it. A blocked account can still sign in and read its letters. If we block you, we refund any letter we haven't mailed and any unused balance.

Sections 3, 9, 12, 13 and 15 survive ending.

15. Governing law and disputes

Georgia law governs these terms, without regard to its conflict-of-laws rules. The state and federal courts located in Georgia have exclusive jurisdiction over disputes about these terms, and you agree to that.

Before you bring a claim, write to support@certifiedmailsender.com and give us a chance to fix it.

16. Changes

We may change these terms. For a material change we will email account holders or post a notice before it takes effect. Using the Service after the effective date means you accept the change. Each version has an effective date. We keep earlier versions available on request.

17. Other terms

These terms, with the pages they name, are the whole agreement between you and us about the Service.
If part of these terms isn't enforceable, the rest still applies.
You may not assign these terms without our consent. We may assign them in a sale or restructuring of the business.
Not exercising a right isn't a waiver of it.
Notices to you go to your account email. Notices to us go to the contact details below.

18. Contact

General and legal: support@certifiedmailsender.com
Abuse reports: abuse@certifiedmailsender.com, or the form at /report
Business line: +1 669-316-8976
Legitimate LLC, registered agent address: 8735 Dunwoody Place Ste N, Atlanta, GA 30350

Appendix A. Click2Mail API Access Terms and Conditions

Click2Mail requires us to give you this text. It is reproduced as Click2Mail published it, as of our registration as a Click2Mail developer.

CLICK2MAIL APPLICATION PROGRAM INTERFACES (APIs)

ACKNOWLEDGEMENT AND ACCEPTANCE. Read this carefully before registering to use the CLICK2MAIL Application Program Interface (API) servers. By utilizing the APIs, you hereby ACCEPT ALL of the terms and conditions of this agreement.

LICENSE GRANT. C2M LLC d/b/a Click2Mail (CLICK2MAIL) grants to the Business User, including customers of Developer, and Developer (jointly referred to as "User"), a worldwide, nonexclusive, nontransferable, royalty-free license to interface with CLICK2MAIL API servers to use the trademarks/logos and CLICK2MAIL data received via the interfaces in accordance with this agreement, the CLICK2MAIL API User Guides, and the Software Distributor Policy Guide.

INTELLECTUAL PROPERTY RIGHTS. The sample code, the documentation, and the trademarks/logos provided on this site and in hardcopy form are the intellectual property of CLICK2MAIL protected under U.S. laws. The information and images presented may not be reproduced, republished, adopted, used, or modified under any circumstances.

USE REQUIREMENTS FOR BUSINESS USER AND DEVELOPER.

User agrees to use the CLICK2MAIL Web site in accordance with any additional requirements that may be posted on the Web site screens, emails, provided in the CLICK2MAIL API User Guides, or in the Software Distributors Policy Guide.
User agrees to use the CLICK2MAIL Web site, APIs and CLICK2MAIL data only to facilitate CLICK2MAIL transactions.
The trademarks/logos and CLICK2MAIL data received via the interfaces may not be used in any way that implies endorsement or sponsorship by CLICK2MAIL of the User or any of the User's products, goods or services.
User may not use the interface in any way that adversely affects the performance or function of the CLICK2MAIL API servers.
User may not post or transmit information or materials that would violate rights of any third party or which contains a virus or other harmful component.
User agrees to provide and keep updated, complete and accurate information about User upon registration for the APIs.

ADDITIONAL USE REQUIREMENTS FOR BUSINESS USER.

Business User is responsible to maintain the confidentiality of its password and ID as specified in the registration process.
Business User may not package software that interfaces with any or all CLICK2MAIL APIs with password and ID for resale or distribution to others.
Business User may reuse and distribute the API documentation and sample code in order to provide API access to customers and affiliates.

ADDITIONAL USE REQUIREMENTS FOR DEVELOPER

Developer may package software that interfaces with any or all CLICK2MAIL APIs with password and ID for resale or distribution to others only after registering with CLICK2MAIL as a Developer and agreeing to these Terms and Conditions of Use.
Developers shall distribute these CLICK2MAIL Terms and Conditions of Use with its software to its customers and any other Business User.

DISCLAIMER OF WARRANTIES. THE MATERIALS IN THE API DOCMENTATION SITE (WWW.DEVELOPERS.CLICK2MAIL.COM), THE SOFTWARE DESCRIBED ON AND DISTRIBUTED FROM SAID SITE, AND THE APPLICATION PROGRAM INTERFACES DESCRIBED ON SAID SITE ARE PROVIDED "AS IS" AND WITHOUT WARRANTIES OF ANY KIND EITHER EXPRESS OR IMPLIED. TO THE FULLEST EXTENT PERMISSIBLE PURSUANT TO APPLICABLE LAW, CLICK2MAIL DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CLICK2MAIL DOES NOT WARRANT OR REPRESENT THAT THE INFORMATION IS ACCURATE OR RELIABLE OR THAT THE SITE OR INTERFACES WILL BE FREE OF ERRORS OR VIRUSES.

LIMITATION OF LIABILITY. UNDER NO CIRCUMSTANCES, INCLUDING BUT NOT LIMITED TO NEGLIGENCE, WILL CLICK2MAIL BE LIABLE FOR DIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES THAT RESULT FROM THE USE OR INABILITY TO USE THE MATERIALS IN THE API DOCUMENTATION SITE (WWW.DEVELOPERS.CLICK2MAIL.COM) OR THE APPLICATION PROGRAM INTERFACES REFERENCED AND DESCRIBED IN SAID SITE. IN NO EVENT SHALL CLICK2MAIL BE LIABLE TO A USER FOR ANY LOSS, DAMAGE OR CLAIM.

TERMINATION. This agreement is effective until terminated by either party. Upon termination of this agreement, User shall immediately cease to use CLICK2MAIL APIs, all associated documentation, and trademarks/logos, and shall destroy all copies thereof in the control or possession of User.

INDEMNIFICATION. User will indemnify and hold CLICK2MAIL harmless from all claims, damages, costs and expenses related to the operation of the User's Web site in conjunction with CLICK2MAIL Web site interface. User shall permit CLICK2MAIL to participate in any defense and shall seek CLICK2MAIL's written consent prior to entering into any settlement.

MAILER RESPONSIBILITY. A mailer must comply with all applicable postal standards, including those in the Domestic Mail Manual and the International Mail Manual. In the event of a conflict between CLICK2MAIL Web site information and USPS Mail Manual information, the USPS Mail Manuals will control.

APPLICABLE LAW. This agreement shall be governed by and construed according to the laws of the Commonwealth of Virginia exclusive of that body of laws known as conflicts of law.

By utilizing the APIs, you hereby ACKNOWLEDGE AND ACCEPT all terms and conditions for using the API servers. If you do not agree to the Terms and Conditions for using the APIs, your sole recourse is to immediately stop all use of the APIs. Your continued use of the APIs constitutes your acknowledgement and acceptance of the terms and conditions.