Content
Forms you can fill out and mail online
Find the right form-to-mail path: guided workflows for supported official PDFs, upload-and-mail for completed forms, and source links for agency and USPS forms.
• Updated May 31, 2026
All published forms
27 forms
Plain letter
Write a letter online, preview the generated PDF, add an optional signature or attachments, and mail it as physical postal mail.
Annual Credit Report Request Form
Fill out the official AnnualCreditReport.com Annual Credit Report Request Form PDF online, choose Equifax, Experian, and/or TransUnion, then mail the request to the official Atlanta processing address.
Certified notice packet
Arizona 20-Day Preliminary Notice
Generate an Arizona 20-Day Preliminary Notice packet, add owner, original contractor, lender, and contracting-party recipients, and prepare Certified Mail pieces for each selected recipient.
Certified notice packet
California 20-Day Preliminary Notice
Generate a California 20-Day Preliminary Notice, review the packet PDF, and prepare one Certified Mail piece for each required recipient.
Dispute packet
Card Billing Dispute Packets
Build a first written billing-error notice or a denied-dispute appeal packet and mail it to the right billing-dispute address with tracking.
CMS-1490S
Patient request for Medicare payment (CMS-1490S).
CMS-20027 - Redetermination Request Form
Medicare redetermination request form used to appeal an initial claim determination.
CMS-20031 - Transfer of Appeal Rights
Medicare form that transfers appeal rights from a beneficiary to a provider or supplier.
CMS-20033 - Medicare Reconsideration Request
Fill out CMS-20033 online with an online-native workflow for a second-level Medicare fee-for-service appeal after an unfavorable redetermination.
Dispute packet
Debt Validation Packets
Build a debt validation letter, debt verification request, or debt dispute packet online, review the generated PDF, and mail it to the debt collector with Certified Mail available.
Certified notice packet
Florida Notice to Owner / Notice to Contractor
Prepare a Florida Notice to Owner or Notice to Contractor packet online, review the generated PDF, and mail it with tracking.
Form 843 COVID Penalty Refund Protective Claim
Prepare an IRS Form 843 protective refund or abatement claim packet for COVID-era penalties and interest, then mail it by Certified Mail.
Form DS-64
Prepare Form DS-64 online to report a valid lost or stolen U.S. passport book or card and generate a mailable PDF.
Gym membership cancellation letter
Create a signed gym membership cancellation letter and PDF form.
Claim packet
Health Insurance Claim Packets
Build a health insurance claim packet online, review the generated PDF, and mail it to the payer or claims department with tracking.
Indiana Attorney General Consumer Complaint
Prepare the Indiana Attorney General Consumer Protection Division printable consumer complaint form as a mailable packet.
IRS Form 1099-NEC (Copy B)
Fill out IRS Form 1099-NEC Copy B online, review the recipient PDF, and mail it to a contractor or other payee.
IRS Form 1120
Fill out IRS Form 1120 online, generate the finished U.S. corporation income tax return PDF, and continue to mailing when you are ready.
IRS Form 5471
Fill out IRS Form 5471 online, generate the completed information return PDF, and include it with the mailing packet for the related tax return.
IRS Form 5472
Fill out IRS Form 5472 online, generate the completed related-party information return PDF, and include it with the correct tax return packet.
IRS Form 8822
Fill out IRS Form 8822 online and generate a mailable PDF for individual IRS address changes.
Opt-out requests
Junk Mail Opt-Out Packets
Create signed direct-mail marketing opt-out requests online, review the PDFs, and mail them to supported junk-mail data providers.
LADWP Time-of-Use Request Form
Fill out LADWP's Residential Time-of-Use Request Form online, sign it, review the generated PDF, and mail it to LADWP's Rate Applications Supervisor.
Demand packet
Payment Demand Packets
Build a payment demand packet online, review the generated PDF, and mail it to the customer with tracking.
Generated workflow
Security Deposit Demand Packets
Build a state-specific security deposit demand packet, attach evidence, preview the generated PDF, and mail it to the landlord with Certified Mail.
Certified notice packet
Texas Notice of Claim for Unpaid Labor or Materials
Generate a Texas Notice of Claim for Unpaid Labor or Materials, attach invoices or billing statements, and prepare Certified Mail pieces for each selected recipient.
VA Form 21-4138
Complete VA Form 21-4138 online, generate a Statement in Support of Claim PDF, attach supporting records, and mail the paper packet to VA.
Quick answer: can you fill out and mail forms online?
Yes. PostalForm supports selected guided form workflows for official PDFs and mail-only packets. When a workflow exists, you answer questions online, review the generated PDF, add sender and recipient addresses, and send the form by postal mail. If your form is already complete, use the general mail-a-form flow to upload the PDF and mail it.
Which form-to-mail path should you use?
| Situation | Best PostalForm path | Notes |
|---|---|---|
| You searched for a "form to mail" or "forms mail" workflow | Start with this catalog or mail a completed form PDF | Use a guided workflow when PostalForm supports the form; otherwise upload the completed PDF. |
| The form appears in this catalog | Start the guided workflow | PostalForm collects the fields, generates the printable PDF, and continues to mailing. |
| You already filled out the official PDF | Mail a form online | Upload the completed PDF, review the print preview, and mail the packet. |
| You need to mail an IRS, USCIS, SSA, court, or agency form | Check the official instructions first | PostalForm can help generate or mail selected packets, but the official form version, address, fee, signature, and deadline control. |
| The agency instructions list a specific address or deadline | Use the agency instructions first | PostalForm can help print and mail, but the official instructions control where and when to send it. |
| The form is a USPS retail service form, money order, PO Box, Registered Mail, Certificate of Mailing, or counter-service request | Use USPS or the Post Office process | PostalForm is for printable form packets; it does not replace USPS counter services, USPS clerk handling, or physical originals. |
Why these form workflows matter
These are not just generic document uploads. For selected forms, PostalForm turns the official printable PDF into a guided online workflow, generates the finished PDF behind the scenes, and continues straight to mailing.
Common form-to-mail routes
Browse by agency
Browse by topic
Recently updated forms
- IRS Form 1099-NEC (Copy B)
- Annual Credit Report Request Form
- Debt Validation Packets
- Gym membership cancellation letter
- Plain letter
- VA Form 21-4138
- Arizona 20-Day Preliminary Notice
- Form 843 COVID Penalty Refund Protective Claim
- Security Deposit Demand Packets
- Junk Mail Opt-Out Packets
- Texas Notice of Claim for Unpaid Labor or Materials
- California 20-Day Preliminary Notice
How it works
- Answer guided questions online
- Generate and review the official PDF
- Add attachments when the packet requires them
- We print and mail it
Before you mail a form packet
- Confirm you are using the current official form version.
- Check the mailing address, deadline, signature, and attachment instructions from the agency or recipient.
- Confirm whether the form can be mailed, must be filed online, or must be handled at a Post Office counter.
- Add copies of required supporting documents, not physical originals unless the instructions allow copies.
- Review the generated PDF before payment.
- Use Certified Mail when proof of mailing or delivery matters.
Forms this page is not for
Some searches for "post office forms" or "postal forms" are really looking for USPS retail-service paperwork, such as money orders, PO Box applications, Registered Mail forms, or Certified Mail forms. Use USPS instructions or a Post Office counter when the task requires USPS clerk handling, a physical original, or a service PostalForm does not offer. For the USPS form differences, see Certified Mail forms. For mailing a letter with Certified Mail through PostalForm, see Certified Mail online.
Official sources to verify before mailing
Resources
FAQs
- Can I fill out and mail a form online?
- Yes, when PostalForm supports the workflow. Choose a guided form, answer the questions, review the generated PDF, then continue to mailing. If your form is already complete, upload the PDF through the mail-a-form flow.
- What if the form I need is not in the catalog?
- Download or complete the official form from the agency first, then use PostalForm to mail the finished PDF if the form can be mailed as a normal document packet.
- Can I use PostalForm for USPS forms?
- Use USPS as the official source for USPS forms and instructions. PostalForm can mail a completed PDF packet, but it does not replace USPS counter services, Certificate of Mailing requests, money orders, PO Box applications, or other clerk-handled USPS processes.
- Can I mail IRS or other government forms with PostalForm?
- Yes, for forms that are allowed to be mailed as paper packets. Always check the official form instructions for the current version, mailing address, signature requirements, fees, attachments, and deadline.
- Does PostalForm file forms electronically?
- No. PostalForm prepares printable PDFs and physical postal mailings. If an agency requires or offers electronic filing, use the official electronic filing process.
- Can I add attachments and Certified Mail?
- Yes. Combine attachments with the generated or completed form PDF when the workflow allows it, then choose Certified Mail when proof of mailing or delivery matters and the mailpiece qualifies.