Stamps.com address verification checks every street address against the USPS database before you print. With CASS-certified technology, you verify an address, standardize the address format, and append ZIP+4 so labels scan cleanly and arrive on time.
With automated USPS address validation inside your workflow, you reduce undeliverables, speed up delivery, and control spend without extra steps or extra tools.
Catch typos, bad ZIP code entries, and non-standard abbreviations before a label is created. By validating each street address against the USPS service database, you prevent wasted postage and avoid packages bouncing back. Cleaner data in means successful deliveries out.
Standardization matters. Stamps.com upgrades five-digit ZIPs to ZIP+4, normalizes abbreviations to USPS-preferred formats, and improves scan accuracy so shipments move through USPS postal operations with fewer exceptions. That means faster routing and predictable arrival times.
Verification happens before you print. There is no separate address verification tool to manage and no add-on charge. Set it once and ship at scale with consistent, USPS-approved results across every order.
Everything you need to check address validity, standardize output, and keep fulfillment moving is built into Stamps.com. These features work together to improve address matches and label quality across your entire address list.
Validate every destination against the USPS Address Matching Service using CASS-certified software. When an address doesn’t match, suggested corrections appear instantly so you can print the right label the first time. Use it as your everyday address validation tool inside Stamps.com to check address validity without leaving your workflow.
Only have a five-digit ZIP code? Stamps.com appends the proper ZIP+4 and normalizes abbreviations to USPS standards for cleaner labels and faster routing. This address validation tool helps your labels scan cleanly and move through sorting with fewer exceptions.
Our system regularly syncs with the USPS Address Matching Service so you are checking against the most current, deliverable address information. List-wide cleansing is included at no extra cost, giving you consistent, accurate output across shipments.
Enable verification once and let Stamps.com do the work in the background as teams print. No separate login, no manual batch process, and no need to copy data between systems. You get address validity at the moment of label creation, so operations keep moving.
Accurate addresses drive measurable improvements in on-time delivery and reduce return handling. Expect fewer customer contacts for wrong addresses, fewer replacement shipments, and a drop in postage waste caused by undeliverables.
For 30 years, Stamps.com has been the trusted platform making it efficient and affordable to print discounted stamps, envelopes, shipping labels, and Certified Mail® from USPS®, UPS®, and more carriers in under 2 minutes. Get up to 90% off rates and save $100 in billable hours value/month by reducing manual tasks and Post Office trips.
It compares each destination to the USPS Address Matching Service using CASS-certified software, flags issues like misspellings or bad ZIP codes, and suggests the USPS-approved version before you print a label.
If you only have a five-digit ZIP, we append the correct ZIP+4 and standardize street and state formats so labels scan cleanly and sort faster through USPS operations—helping packages move without exceptions.
It’s built into Stamps.com. Addresses are cleansed and verified automatically before labels or postage print—no extra software to manage.
No. Stamps.com cleanses every address on your list at no additional charge as part of the label creation process.
Stamps.com regularly syncs with the USPS Address Matching Service Database so your labels reflect the most current, deliverable information available.
When the software detects an issue, it offers the USPS-approved alternative—much like a spell checker—so you can correct and print with confidence.
Yes. By catching typos, non-standard abbreviations, and incorrect ZIP codes before printing, you can prevent undeliverables, avoid postage waste, and improve on-time delivery.
They work together. CASS-certified cleansing and verification standardize formatting and confirm deliverability against USPS data, ensuring addresses meet USPS-preferred specs.
Yes. Abbreviations are normalized to USPS standards and labels are formatted consistently for machine readability and faster routing.
Standardized, verified addresses help more mail get delivered, which can improve response rates and customer experience by speeding delivery.
With Stamps.com’s built-in address verification, you can print labels that meet USPS standards, eliminate costly delivery errors, and keep every shipment on schedule—automatically. Start verifying addresses today and see how much time, money, and hassle you can save.
