LetterAgent
Mail physical letters by just asking your AI assistant.
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Sign the document on your phone or computer by drawing, typing, or inserting a signature image, then save it as a flattened PDF so the signature cannot shift, and send it by fax. The reliable order is sign first, flatten second, fax third. Ask your AI assistant to send the fax: you will approve the exact quoted total before anything is sent.
On a phone, the built-in drawing tools are usually enough: open the document in Files or your PDF app, tap the pen icon, and sign with your finger or a stylus. On a computer, most PDF readers have a "fill and sign" feature where you draw your signature once and place it wherever you need it. Either way, keep a clean signature image saved somewhere you can find it, because you will sign things more than once a year.
Two tips that save real trouble. First, check whether the recipient needs a wet-ink signature: most businesses and agencies accept electronic signatures, but some courts and lenders still want pen on paper. Second, sign the document BEFORE you fax it, not after: once a fax is sent, the recipient's copy is whatever left your side.
An electronic signature placed in a PDF is often an annotation: a layer sitting on top of the page. Some fax services strip annotations when converting the file, which can send your signature off-page, shrink it, or drop it entirely. Flattening bakes the signature into the page itself so it becomes part of the image. Most PDF tools have a "print to PDF" option, which produces a flattened copy: open the signed file, print it, and choose "Save as PDF" as the printer. That new file is what you fax.
| Step | What to do | Common mistake |
|---|---|---|
| 1. Sign | Draw, type, or insert your signature image on the document | Signing a photo of the document instead of the document itself |
| 2. Flatten | Print to PDF so the signature becomes part of the page | Sending the annotated file; the signature can vanish in conversion |
| 3. Check | Open the flattened file and zoom in on the signature | Assuming it looks fine without opening it |
| 4. Fax | Send to the recipient's fax number; keep the confirmation | Faxing without a cover sheet when the recipient asked for one |
The usual failures are legibility and acceptance. Fax resolution is low, so a thin signature can come out as a smudge on the other end: sign a bit larger and darker than feels natural. The other risk is acceptance: a few recipients (courts, some lenders, some government offices) specify wet-ink originals for certain forms. When in doubt, ask before you fax. A rejected fax costs you the send and the time; a five-second question does not.
Ask your AI assistant to send the fax through LetterAgent. You describe the document, the assistant gives you a per-fax quote with the page count verified, you approve the exact total, and you pay once. LetterAgent faxing is available in testing right now: it sends to US and Canadian fax numbers only, and there is no inbound fax. Keep the confirmation page for your records, since some recipients ask for it later.
Ready to fax it? Fax with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is sent.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
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