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Certimail

Privacy policy

Effective October 14, 2026

Certimail lets you mail a letter by USPS Certified Mail or First-Class Mail from inside Muse. To do that we have to handle the letter, the addresses on it, and your payment. This policy explains exactly what we collect, who else touches it, and how long we keep it. We wrote it to be read.

Certimail is operated by Georgina Hawley, an individual and the sole developer. In this policy, "we" and "us" mean her. You can reach us at support@certimail.guaranteecheck.org.

Short version: we use your letter and addresses only to print and mail your letter. We do not sell your information, we do not use it for advertising, and we delete the letter text and addresses from our records 90 days after your order is finished.

What we collect

Information you give us through Muse

Muse is run by Meta. Meta passes us the details of a request when you ask Muse to use Certimail. We do not receive the rest of your Muse conversation, and we do not know your Meta account identity beyond what is needed to complete the order. How Meta handles your conversations is covered by Meta's own privacy policy.

Payment information

Payments are handled by Stripe, including Stripe Link if you use it. Your card and bank details go to Stripe and never reach our systems. We receive only a payment reference, the amount, the status (paid or refunded), and your email address if you entered one at checkout.

Order information we create

For each order we keep an order ID, the date, the mail service, the price, the order status, the Stripe payment reference, the print vendor's letter reference, and the USPS tracking number once the letter is mailed.

Launch-list emails

If you email us to join the launch list, we keep the email address you send from and nothing else. We use it for one purpose: a single email when Certimail becomes available in Muse. We will not use it for anything else or share it. We delete it after we send that launch notice, or sooner if you ask. To be removed at any time, email support@certimail.guaranteecheck.org and say so.

Website visits

This website may use privacy-friendly Cloudflare Web Analytics to count visits. It does not use cookies and does not track you across other sites. Cloudflare hosts the site and may log standard technical data such as IP address and browser type to deliver pages and protect against abuse.

How we use it

We do not use your letters or addresses to build advertising profiles, to market to you or the recipient, or to train AI models.

Who else handles your information

WhoWhyWhat they receive
PostGridPrint and mail vendorThe letter, the recipient and sender addresses. PostGrid prints the letter and hands it to USPS, and keeps data under its own privacy policy.
USPSDelivers the letterThe addresses on the envelope, as with any mail, plus certified tracking data.
StripePayments and refundsPayment details and your email address.
CloudflareWebsite hosting and analyticsStandard web traffic data.
Meta (Muse)The assistant you use to place the orderWhatever you type to Muse. They also receive the results we send back to Muse, such as the price and order status.

The recipient of your letter will read it and can see your return address, as with any mail. A mailed letter cannot be recalled or deleted, and we cannot control what the recipient or USPS does with it.

We may also disclose information if the law requires it, such as a valid subpoena or court order, or when needed to protect people from fraud, threats or other serious harm. We do not sell or rent your information.

Content check

Before payment, an automated check scans letter text for direct threats and harassment. If a letter is refused, nothing is charged and nothing is mailed. The check is software only. We do not read your letters as part of normal operation. A person may look at a specific letter if needed to resolve a support request you send us, investigate suspected abuse, or comply with the law.

How long we keep it

Your choices

You can email us to ask what we hold about an order, to correct it, or to delete it sooner than the schedule above. We will respond within 30 days. We can delete what is in our records. We cannot make PostGrid, Stripe, USPS or Meta delete their copies, but we will point you to how to ask them. We will honor these requests wherever you live, including Texas.

Security

We send data only over encrypted connections, keep payment details off our systems by using Stripe, and limit access to order data to what is needed to run the service. No system is perfectly secure, so please do not put in a letter anything you would not be willing to mail.

Who can use Certimail

Certimail is for people 18 or older in the United States. We do not knowingly collect information from children.

Changes

If we change this policy we will update the date at the top. If a change affects how we use information we already hold, we will tell people with open orders by email where we have their address.

Contact

Questions, requests or complaints: support@certimail.guaranteecheck.org. Certimail, operated by Georgina Hawley.