AI fills out yourPDF forms.
AI form filling · Certified mail · Online notary
AI fills out your
PDF forms.Upload your documents and the AI does the typing — every field, even a 20-page government form. You review, correct, and sign. Then notarize it online over video chat\*, and we'll mail it for you.
1Upload docs, pick a form
2AI fills it, you review
3Print, notarize, sign & mail
Built for landlords, contractors, and small businesses. And for the AI agents that work for them.
USPS Certified Mail® 110+ ready forms · any PDF Notary built in Mailed next business day
Record of Send NO. 0047-2210
Document Security deposit demandCERTIFIED
Recipient Coastal Property ManagementPortland, Oregon
Tracking 9407 1102 0083 5551 2470 18
Prepared from your vaultSender and lease details prefilled 3:58 PM
NotarizedRemote session, ID verified 4:12 PM
Printed and mailedUSPS Certified Mail® NEXT DAY
Delivered — signature on fileWell sent. Proof archived. MAR 14
RETAINED PERMANENTLY WELLSENT.AI/R/0047
Built by alumni from 
Debt validation letter $14 IRS 8822 address change $12 Security deposit demand $14 Passport renewal kit DS-82 $19 CA 20-day preliminary notice $19 Timeshare rescission $19 S-corp election 2553 $14 Gym cancellation $12 Debt validation letter $14 IRS 8822 address change $12 Security deposit demand $14 Passport renewal kit DS-82 $19 CA 20-day preliminary notice $19 Timeshare rescission $19 S-corp election 2553 $14 Gym cancellation $12
SENT VIA USPS CERTIFIED MAIL®
Jane Alvarez2214 NE Going St, Portland, OR 97211
MARCH 11, 2026
Coastal Property Management 411 SW 5th Avenue, Suite 300 Portland, OR 97204
RE: Demand for return of security deposit — 2214 NE Going St, Unit B
Dear Coastal Property Management:
I vacated the above unit on January 31, 2026 and provided my forwarding address in writing on that date. Oregon law required you to return my security deposit of $1,850.00, or provide a written accounting of any deductions, within 31 days of that date.
That deadline has passed. I have received neither the deposit nor an accounting. Please be advised that Oregon law entitles a tenant to recover twice any amount wrongfully withheld.
Demand is hereby made for payment of $1,850.00 within 14 days of the date of this letter…
Jane Alvarez
NOTARIZED · ID VERIFIED MAR 11 2026
The letter itself
The kind of mail that gets answered.
Not an email that gets archived. A finished, professional document on paper, signed for at the door.
Filled by AI, approved by you
The AI drafts every field from your documents. You review, correct, and add whatever's missing before anything prints.
Sealed when it matters
Affidavits and POAs get a licensed remote notary's seal by video before they mail — one flow, zero bank lobbies.
Delivered with a receipt
Certified tracking and a signature on file. You'll know the day it lands — and be able to prove it years later.
Who it's for
Who uses wellsent.
One letter this year or fifty a month — the flow is the same.
For individuals
One important document
A passport renewal, a deposit demand, an IRS form. Answer a few questions, review the filled form, and it's mailed with proof of delivery.
- AI fills it, you review and sign
- Notarize by video when required
- Certified mail with tracking
- Tenant notices, demands, project notices
- Saved senders, recipients, and templates
- Every letter archived with tracking
- REST API and MCP server
- Webhooks for every delivery event
- Sandbox for testing — nothing mails
For businesses
Official mail every month
Property managers, contractors, and back offices. Saved details and templates mean each notice takes seconds, not an afternoon.
For developers
Mail from your software
One API call fills a form and mails it. Add certified mail, notarization, and delivery tracking to your product — or to your AI agent.
How it works
From "ugh, paperwork" to postmarked in four steps.
Including the part everyone dreads — the notary happens over video, right inside the flow.
01
Pick it or upload it
Pick from the catalog, or upload any PDF. Any form. Really.
02
AI fills it out
Drop in your documents or answer plain questions. The AI fills every field; the vault prefills what it already knows.
03
You review & correct
Fix anything, add anything. Nothing prints or mails until you say so.
04
Print, notarize, sign & mail
All from the app. Online notary when required, then USPS Certified Mail® with tracking and proof.
Every send teaches the vault. The work you do once, you never do again.
Saved details
Fill it once. Never type it again.
Your names, addresses, entities, and documents are saved securely to your account. The next form starts already filled in — you just check it and send.
30 sec
Repeat sends
Your saved details fill the next form automatically. You review it and hit send.
100%
Archived
Every send is saved with its tracking and delivery proof, so you can find it — and prove it — later.
1 tap
Your data, your call
Export or permanently delete everything you've saved, anytime. Never sold, never used for training.
What we do
From "this needs to go out" to "here's proof it arrived."
AI form filling
An hour of typing becomes two minutes of reviewing.
Upload your documents and the AI fills every field — from a one-page W-9 to a 20-page immigration application — and explains each value it chose. You review, correct, add, and sign in the app.
Certified mail with proof
"I never got it" stops working on you.
We print and mail via USPS Certified Mail® with tracking and return receipt. Delivery confirmations and signatures are saved to your account permanently.
Online notarization
No bank lobby. No appointment. Five minutes.
When a document needs a seal, a licensed online notary joins by video, verifies your ID, and stamps it — legally valid, right inside the same flow.
The permanent record
Prove what you sent — this year or in five.
Every send becomes a retrievable record: the document, timestamps, tracking, and signatures, archived together and searchable.
The API & MCP server
Your software gets hands in the physical world.
Physical mail as a function call. Fill forms, trigger notary sessions, and subscribe to delivery webhooks from any codebase — or connect the MCP server and let an AI agent run correspondence under approval rules and spending limits you define. Every agent action logged.
# one call. real mail.
POST /v1/sends
{
"form": "debt_validation_letter",
"recipient": "rcp_8f2a", # from vault
"answers": { "amount": "$2,140.00" },
"delivery": "certified_return_receipt"
}→ 201 { "tracking": "9407 1102 …",
"status": "queued_for_print" }
Most sent
The greatest hits.
Filled, mailed Certified Mail®, archived with proof. Prices include postage.
Debt validation letter$14 Make a collector prove the debt before you pay. The statutory clock starts when they sign. Certified · Most sent Security deposit demand$14 Your former landlord is past the deadline. Cite your state's law and start the clock. Certified · Most sent DS-82 passport renewal kit$19 Form filled, fee check template, photo checklist, prepaid label to the processing center. Complete kit Preliminary notice — CA·TX·AZ·FL$19 Preserve lien rights on every job. Save the project once; notice in seconds after that. Certified · Recurring IRS 2553 S-corp election$14 Routed to the correct IRS service center for your state, sent certified, proof archived. Certified · Deadline Timeshare rescission packet$19 Rescission windows are brutal and short. Postmarked in time, with proof it was. Certified · Deadline
The catalog
Name the form. We've got the form.
Opt-out letters to 20-page immigration applications. Search or browse.
TYPE TO FILTER
All Cancel & opt out Money & disputes Landlord & tenant IRS & tax Business Immigration Social Security & Medicare Courts & family Construction Government & benefits
Junk mail opt-out packet Gym membership cancellation Timeshare rescission packet Vehicle service contract cancellation Subscription cancellation letter Debt validation packet Annual credit report request Card billing dispute packet Payment demand packet Final demand before legal action Dispute invoice letter Contractor payment demand HVAC unpaid invoice demand Landscaping unpaid invoice letter Security deposit demand (state-specific) NJ security deposit return + check Notice to vacate — all 50 states Late rent notice Lease non-renewal letter Lease violation notice Three-day notice to pay rent or quit Rental application (NAA B-15) UD-100 unlawful detainer complaint UD-105 answer — unlawful detainer Residential lease (C.A.R. LR) W-9 FILLED IN 25s W-4 withholding W-2 wage statement 1099-NEC 1099-MISC 1040 individual return 1040-X amended return IRS 8822 address change IRS 8822-B business address change Form 843 penalty refund claim 9465 installment agreement 4506-T transcript request 2848 power of attorney (IRS) 4868 filing extension Schedule C profit or loss 941 quarterly payroll return 940 annual FUTA return 1120 corporate return 1120-S S-corp return 1065 partnership return CA Form 540 resident return CA Form 568 LLC return SS-4 EIN application 2553 S-corp election 8832 entity classification SBA 1919 borrower info SBA 413 personal financial statement SBA Form 5 disaster loan WH-347 certified payroll W-8BEN-E Registered agent change (state) LLC articles of cancellation N-400 naturalization 14 PAGES I-485 adjustment of status 20 PAGES I-130 petition for relative I-90 green card replacement I-765 work authorization I-131 travel document I-539 extend/change status I-751 remove conditions I-129 nonimmigrant worker I-864 affidavit of support I-134 financial support I-589 asylum application G-28 attorney appearance AR-11 change of address SS-5 Social Security card SSA-44 Medicare IRMAA appeal SSA-1-BK retirement benefits SSA-16 disability benefits SSA-827 authorization to disclose SSA-3373 function report CMS-20027 Medicare redetermination CMS-20033 Medicare reconsideration CMS-1490S patient payment request CMS-40B Medicare Part B enrollment CMS-1500 health insurance claim Medical records request packet Health insurance claim packet SC-100 small claims FL-100 dissolution petition FL-150 income & expense declaration FL-300 request for order DE-111 petition for probate GC-210 guardianship petition NC-100 name change petition DV-100 restraining order request JS 44 civil cover sheet SF-95 federal tort claim Bankruptcy Form 101 voluntary petition AO 88 subpoena to testify Proof of service (SC-104) Fee waiver application (FW-003) Arizona 20-day preliminary notice California 20-day preliminary notice Florida notice to owner Texas notice of claim — unpaid labor Building permit application (local) Contractor license application DS-82 passport renewal DS-11 new passport application DS-64 lost or stolen passport VA 21-4138 statement in support VA 21-526EZ disability compensation SF-180 military records request SF-15 veteran preference EEOC Form 5 discrimination charge FOIA / public records request AG consumer complaint (state) DMV bill of sale (REG 135) DMV release of liability Disabled person placard application IDR student loan plan request LADWP time-of-use request Write & mail a plain letter
Don't see yours? That's fine — neither does this page. Upload any PDF — flat, scanned, or fillable — and the AI detects the fields, fills it from your documents, and mails it certified. If it's a form, we can send it well.
Pricing
Cheaper than the errand. Infinitely fewer errands.
No subscription required. Members just pay less and skip the line.
Per send
$12–19 / letter
One document, handled right. No account gymnastics.
The mailroom Membership
$24 / month
You send every month. This is your mailroom on retainer.
Enterprise & developers
Custom
For platforms, agent builders, and teams that send at volume.
Prices include first-class postage and listed Certified Mail® fees. Cancel anytime — your archive stays yours.
Questions
Asked often.
Answered straight.
Is this legal advice? Are you a law firm?+
No and no. wellsent fills forms, notarizes, and mails — we don't advise on your specific situation, and using us doesn't create an attorney-client relationship. If your situation calls for legal advice, talk to a licensed attorney.
What proof do I get that my letter was delivered?+
Every letter travels USPS Certified Mail® with a tracking number in your account. Add return receipt and you get the recipient's signature. The letter, tracking history, and delivery confirmation are archived permanently — years later, you can prove exactly what was sent, when, and who signed.
How does the AI fill a form it's never seen?+
Upload any PDF — fillable, flat, or scanned — and the AI detects the fields from the layout, then extracts values from the source documents you attach or the answers you type. Every filled field comes with an explanation of where the value came from, and you review the finished document before anything prints.
Is online notarization legally valid?+
Yes. Remote online notarization is authorized in the large majority of U.S. states, and notarizations by a commissioned online notary are generally recognized across state lines. Our notary partners verify your ID, record the session as required by law, and apply a tamper-evident seal. A few document types still demand ink — we flag those before you pay.
What lives in my vault, and how is it protected?+
Only what you provide: names, addresses, entities, and documents you upload. Encrypted at rest and in transit, never sold, never used to train anything. Export or permanently delete your vault anytime. It exists for one reason — so your next send starts prefilled instead of blank.
How fast does my letter go out?+
Letters finalized before the daily cutoff print and mail the next business day; members get a same-day cutoff. Tracking appears as soon as USPS scans the letter, usually within 24 hours of printing.
What if I make a mistake or change my mind?+
Any time before your letter prints, edit or cancel for a full refund. Once it enters the mail stream we can't recall it — that's physics — but we'll help you send a correction immediately.
The thing you've been putting off?
Postmarked tomorrow.Pick the form. Answer the questions. We handle the paper, the notary, the postage, and the proof.