What Is Certified Mail?
Learn what Certified Mail is, when to use it, and how to send it online without visiting the post office.
Certified MailRead Guide →
Online Mail Guides for 2025
Learn how to send mail online without a printer or post office. Complete guides for USPS services, Certified Mail, addressing, and costs.
Our comprehensive mail guides cover everything you need to know about modern postal services. Learn how to send Certified Mail online with tracking and delivery confirmation, master proper envelope addressing to avoid delays, understand current USPS pricing and mail delivery times, and discover how to mail documents without visiting a post office. Whether you're sending legal notices, business correspondence, or personal letters, these step-by-step tutorials will help you navigate USPS services efficiently. From understanding how many stamps you need, to comparing Certified vs Return Receipt options, to handling returned mail—we've got you covered with practical, actionable advice that saves time and money.
⭐ FEATURED GUIDEMost Popular
Send Mail Online — Fast, Affordable, Certified Options
Send mail online instantly without going to the post office. Compare USPS Certified Mail, First Class, and business mail options. Pricing, tracking, and 24-48hr processing.
Start Here — Most Popular Guide →
Explore By Topic
Showing all 43 guides•Sorted by Popular
Mail Guides List
Certified Mail Forms (2025 Guide): PS Form 3800, 3811, 3806 & More
Learn about USPS Certified Mail forms in 2025: PS Form 3800 (receipt), PS Form 3811 (return receipt/green card), PS Form 3806, PS Form 3849, and more — with step-by-step instructions & examples.
Certified MailRead Guide →
How to Address an Envelope (USPS Guide + Examples for 2025)
Step-by-step guide on how to address an envelope correctly for USPS in 2025. Learn the correct way to write addresses and where to put return address.
Addressing & FormattingRead Guide →
How Much Does It Cost to Mail a Letter in the U.S.?
Learn how much it costs to mail a letter in the U.S. with updated 2025 USPS postage rates. See pricing for standard letters, extra ounces, postcards, and international mail.
Online MailingRead Guide →
Certified Mail in 2025 – USPS Fees & Online Alternatives Explained
Certified Mail costs more than just a stamp. In 2025, USPS adds fees for extras like return receipts. Here
Certified MailRead Guide →
How to Send Certified Mail Online in 2025 (No Post Office Trip Needed)
Send certified letter online with USPS tracking and proof of delivery. Avoid the post office and mail legal documents online from computer or phone with electronic return receipt.
Certified MailRead Guide →
How to Address a Letter (2025): 10 Common Mistakes to Avoid & USPS Rules
Avoid the 10 letter addressing mistakes that delay or return your mail. Follow USPS-approved formatting, abbreviations, and positioning rules for 2025.
Addressing & FormattingRead Guide →
USPS Mail Delivery Times by State 2025: Complete Guide
Complete guide to USPS mail delivery times by state in 2025. Learn how long First-Class Mail takes from your state to any destination, plus faster mailing options.
USPS ServicesRead Guide →
Certified Letter from IRS: What It Means & How to Respond
Received a certified letter from the IRS? Learn what it means, how to respond properly, and how to send certified mail back to the IRS online.
Certified MailRead Guide →
Certified Mail vs Priority Mail (2025): Which Should You Use?
Certified Mail provides proof of delivery for $4.35. Priority Mail offers faster 1-3 day delivery. Learn the key differences and which USPS service to choose.
Certified MailRead Guide →
Certified Mail vs Registered Mail (2025) – Cost, Speed & Security Compared
Complete comparison of Certified Mail vs Registered Mail in 2025. Learn the differences, costs, security levels, and when to use each USPS service.
Certified MailRead Guide →Certified Mail vs Return Receipt - What's the Difference?
Learn the key differences between Certified Mail service and Return Receipt add-on. Understand when you need proof of delivery vs proof of mailing for legal documents.
Certified MailRead Guide →
Does Certified Mail Require a Signature? USPS Rules for 2025 Explained
Learn whether USPS Certified Mail requires a signature, what return receipt means, and how to send your letter online.
Certified MailRead Guide →
Does USPS Deliver on Saturdays? (2025 Guide)
Yes—USPS delivers on Saturdays. See which services qualify today, delivery windows, and guaranteed options.
USPS ServicesRead Guide →
Email → Snail Mail (USPS)
Turn any email into physical USPS mail. Paste or upload your email, we print, envelope, and mail via First‑Class or Certified with optional e‑Return Receipt.
Online MailingRead Guide →How Long Does Certified Mail Take? USPS Delivery Times for 2025
Certified Mail typically takes 3–5 business days with First-Class, or 1–3 days with Priority Mail. Learn delivery times and tracking updates.
Certified MailRead Guide →
How Many Stamps Do I Need to Mail a Letter? 2025 Guide
Wondering how many stamps to mail a letter in 2025? See postage rates by weight, cost charts, and how to send letters online without stamps.
Online MailingRead Guide →
How to Address a Letter: Complete Guide 2025
Master how to address a letter with this complete guide. Learn proper envelope addressing, USPS formatting rules, return address placement, and common mistakes to avoid.
Addressing & FormattingRead Guide →
How to Address Military Mail (APO/FPO/DPO) 2025: Complete Guide
Complete guide to addressing military mail with APO, FPO, and DPO addresses in 2025. Learn proper format, postage rates, restrictions, and delivery times.
Online MailingRead Guide →
How to Mail a Letter (Step-by-Step Guide)
Learn where to write recipient and return addresses, where postage goes, and how to mail your letter — or skip the post office with TheLetterPilot.
Online MailingRead Guide →
How to Print and Mail a Letter Without Going to the Post Office
No printer? No stamps? No problem. Learn how to print and mail a letter online without going to the post office using TheLetterPilot.
Online MailingRead Guide →
How to Mail a PDF Document Online
Need to mail a PDF but don’t have a printer? Upload your file and we’ll print and mail it for you — fast, secure, and fully online.
Online MailingRead Guide →
How to Print Address Labels from Excel (Easy Mail Merge Guide)
Learn step-by-step how to create and print address labels directly from Excel spreadsheet data using Word mail merge. Plus, discover a faster way to mail without printing labels.
Addressing & FormattingRead Guide →How to Print and Mail a Letter Without Going to the Post Office
No printer? No stamps? No problem. Learn how to print and mail a letter online without going to the post office using TheLetterPilot.
Online MailingRead Guide →How to Send Certified Mail Without Going to the Post Office
Learn to send USPS Certified Mail in 2025 — online or at the post office. Skip the trip with The Letter Pilot and send from home in minutes.
Certified MailRead Guide →
How to Send a Letter Internationally in 2025: Complete Guide
Complete guide to sending international mail in 2025. Learn USPS international rates, customs forms, addressing requirements, and delivery times worldwide.
Online MailingRead Guide →
How to Send Mail Online in 2025: Complete Guide
Send mail online without a printer—upload, we print & USPS mails it today. Certified & international options, costs, and step-by-step guide for 2025.
Online MailingRead Guide →How to Write a Certified Letter in 2025 (With Template)
Step-by-step guide on how to write a certified letter for USPS. Includes a sample letter, formatting tips, and how to send it online.
Certified MailRead Guide →
How to Write an Address on a Letter (USPS Format)
Learn how to write an address on a letter correctly. See examples for sender and recipient addresses, formatting tips, and USPS standards.
Addressing & FormattingRead Guide →
Is USPS Still the Best Way to Mail a Letter?
We break down whether USPS is still the best way to send mail in 2025 — and when online mailing is faster, easier, and more convenient.
USPS ServicesRead Guide →
How Long Does USPS Mail Forwarding Last?
Complete guide to USPS mail forwarding timeframes, renewal options, and costs. Learn the difference between temporary and permanent forwarding in 2025.
Online MailingRead Guide →
What is a Mail Scanning Service?
Complete guide to mail scanning services in 2025. Learn how they work, costs, benefits, security features, and whether digital mail is right for you.
Online MailingRead Guide →Send Certified Mail Online (USPS)
Send USPS Certified Mail online—upload your letter, we print, add Certified + return receipt, and mail it today. Pricing, delivery times, and step-by-step 2025 guide.
Certified MailRead Guide →
Top 5 Alternatives to a PO Box in 2025
Discover 5 modern alternatives to traditional PO boxes. Compare virtual mailboxes, coworking spaces, and other solutions for businesses and individuals.
Online MailingRead Guide →
PO Box Costs in 2025: USPS vs UPS vs Virtual Mailboxes
Complete guide to PO Box pricing in 2025. Compare USPS, UPS Store, and virtual mailbox costs with up-to-date pricing tables and recommendations.
Costs & PricingRead Guide →How to Print and Mail Documents From Home or Nearby
Discover how to print documents online, find a print shop near you, or mail letters from home using tools like 8.5 by 11 paper, white mailboxes, and spiral binding machines.
Online MailingRead Guide →
Return to Sender USPS: What It Means & How to Handle It
Learn what happens when USPS returns mail to sender, why it occurs, and how to prevent returned mail. Complete guide with USPS rules and solutions.
USPS ServicesRead Guide →
Send a Letter Online in 2025: The Complete Guide
Send letters online starting under $5 without a printer or post office. Upload your document and we handle printing, postage, and USPS delivery in 24-48 hours.
Online MailingRead Guide →Snail Mail Letters: What They Are and How to Send One Online in 2025
Snail mail still matters in 2025. Learn what snail mail is, why people use it, and how to send physical letters online starting under $5 without going to the post office.
Online MailingRead Guide →Snail Mail Meaning (And Why It Still Matters in 2025)
Snail mail meaning explained: Learn what snail mail is, how it compares to email, and why people still use it today. USPS mailing guide included.
Online MailingRead Guide →
USPS Says Delivered But No Package? 5 Steps to Find Missing Mail
USPS tracking shows delivered but you can
USPS ServicesRead Guide →
Why Would You Get a Certified Letter? Common Reasons & What to Do (2025)
Certified letters come from the IRS, banks, courts, employers, and government agencies. Learn why you received one and how to respond properly.
Certified MailRead Guide →
ZIP+4 Code Format Guide: How to Use 9-Digit ZIP Codes
Learn how to use ZIP+4 codes for faster mail delivery. Complete guide to 9-digit ZIP code format, benefits, and how to find ZIP+4 codes for any address.
Addressing & FormattingRead Guide →
Ready to Send Your First Letter?
No printer needed. Upload your document and we'll handle printing, postage, and USPS delivery.