CASS and NCOA are address hygiene services that save your postage budget by correcting formatting errors and updating moved addresses. CASS standardises lists to USPS specifications, while NCOA matches records against the national change-of-address database. Together, they eliminate undeliverable mail and qualify your campaigns for lower commercial bulk postage rates.
Have you ever spent thousands of dollars on marketing mailers, only to have a large stack returned as undeliverable? It’s a frustrating waste of print and postage. When we manage campaigns for companies mailing to prospects in the USA, we see this issue frequently. Address databases degrade at a rate of roughly 15% each year because people move and mail carriers change routes. If you don’t clean your list, you’re paying to print letters that will end up in the recycle bin.
But you can easily stop this budget leak. By using CASS and NCOA checks, you ensure your list is fresh and accurate. In this post, we’ll explain how these database scrubbing processes work and how they protect your bottom line. You’ll learn to eliminate waste and qualify for the lowest mailing rates. After reading, you’ll know how to run a highly efficient direct mailing service campaign.
Key Takeaways
- CASS standardisation corrects spelling and adds ZIP+4 codes to guarantee your mail reaches the right physical address.
- NCOA checks your mailing database against recent moves to prevent shipping mailers to old customer addresses.
- USPS requires both updates before you can qualify for bulk postage and commercial direct mail presort discounts.
- Address cleaning typically cuts waste by 5-10% and increases direct mail campaign response rates.
Understanding CASS: Standardizing Your Address Data
Have you ever wondered how the post office reads millions of letters every single day? They use automated optical scanners. For these machines to work, your address labels must match standard rules. This is where CASS, or Coding Accuracy Support System, comes in.
CASS software checks your list against the official USPS database. It corrects spelling mistakes, updates street suffixes, and adds ZIP+4 codes.
How does this standardisation protect your budget? Without CASS, a letter addressed to a business in the USA, like “123 Main Strt” in Chicago, IL might get delayed or returned. When you standardise your list with a bulk letter mailing service, you make sure the address is real and complete. In fact, CASS certification is the first step to qualify for major postal discounts.
Here is a quick look at how CASS cleans up common address mistakes:
Original Address → “100 N st state st Chicago”
CASS Standardised Address → “100 S State St, Chicago, IL 60603-5600”
Correction Made → Corrected direction, added state and ZIP+4
Original Address → “456 west main street apt 2”
CASS Standardised Address → “456 W Main St Apt 2, Chicago, IL 60601-1234”
Correction Made → Standardised street abbreviation and format
Original Address → “789 Broadway Ave”
CASS Standardised Address → “789 Broadway, Chicago, IL 60614-2211”
Correction Made → Corrected street type suffix and added code
By using a direct printing service that includes CASS processing, you ensure every mailer you print has a valid destination.
What does it mean for an address to be CASS certified?
A CASS certified address has been verified against the official USPS database for accuracy and formatting. The software checks the spelling of street names, corrects prefix and suffix directions, and adds the correct ZIP+4 code. This certification ensures that the address actually exists and can receive mail from the carrier.
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Navigating NCOA: Keeping Track of Customer Moves
Standardising addresses is only half the battle. What happens when your customers move to a new house? How do you keep up when people are always moving? In places like Dallas, TX, thousands of residents change homes every month. In fact, about 14% of the population moves every year. If you send mail to their old address, it will go to waste.
This is why we use the National Change of Address (NCOA) database. When individuals or businesses move, they file a change-of-address form with the post office. The USPS compiles this data. Our NCOA processing checks your customer list against this official database. If a match is found, the software automatically updates the record with the new address.
Using NCOA ensures your mailing list quality remains high, preserving your marketing mailers budget across all direct mailing services.
Database Hygiene Tip
Database hygiene is a continuous process. According to the USPS, over 40 million Americans move annually. Running your list through NCOA prior to every direct mail campaign is the only way to avoid sending letters to empty houses or new residents who don’t know your brand.
How does the NCOA process work?
The NCOA process works by matching your database records against the USPS change-of-address database. The software looks for matching names and addresses. When it finds a match, it provides the new address and the date of the move. This allows you to update your mailing list before sending out your marketing pieces.
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The Financial Impact: How Address Hygiene Cuts Mailing Waste
Let’s look at the actual numbers. Is cleaning your list really worth the effort? Many business owners in Miami, FL believe that address hygiene is an unnecessary cost. But the math shows otherwise. Wasted print and postage add up very fast.
Every returned letter costs you money. You pay for the design, the paper, the envelope, and the postage. When you send mail to an invalid address, your response rate drops. By removing these bad records, you instantly save money.
Here is a cost comparison for a typical mailing of 10,000 letters:
| Expense Category | Without Hygiene | With CASS & NCOA | Difference |
| Initial List Size | 10,000 records | 10,000 records | — |
| Invalid/Moved Addresses | 800 records | 0 records | 800 removed |
| Wasted Printing Cost | $480 | $0 | Save $480 |
| Wasted Postage Cost | $440 | $0 | Save $440 |
| Total Campaign Cost | $6,200 | $5,280 | Save $920 |
In this scenario, cleaning your list saves nearly one thousand dollars on a single run. These savings can easily fund your next direct mail printing job or increase your overall marketing reach.
Read More About: Streamline Your Direct Mail Campaigns from Design to Delivery
Why does USPS require CASS and NCOA for bulk mailing discounts?
The USPS requires CASS and NCOA processing to reduce the volume of undeliverable-as-addressed mail. Processing bad mail costs the postal service billions of dollars each year. By making these checks mandatory for commercial discounts, the USPS ensures that presorted mail is highly deliverable. This reduces their operating costs and allows them to pass the savings to you.
Setting Up a Direct Mail Campaign With Clean Data
Are you ready to launch a highly profitable mailing? What is the best way to get started? If you’re a business owner in Los Angeles, CA, you want to make sure your marketing dollars are spent wisely.
Working with professional direct mail companies makes the process simple. They will handle the data cleaning, printing, and shipping under one roof. Here is a checklist of the steps you should follow:
- GATHER YOUR LIST
Export your customer or lead database into a clean CSV file. - RUN CASS MATCHING
Correct typos and standardise formatting to USPS guidelines. - PROCESS NCOA CHECKS
Identify customers who moved and update their addresses. - REMOVE DUPLICATES
Ensure you are not sending multiple letters to the same household. - PRINT AND MAIL
Use a quality letter mailer to drive calls to your sales team.
By following these steps, you will protect your budget and get more calls from your campaigns.
How often should you run CASS and NCOA checks on your mailing lists?
You should run CASS and NCOA checks on your mailing lists at least once every 95 days. The USPS requires lists to be updated within this timeframe to qualify for commercial bulk mailing discounts. If you mail more frequently, it is best practice to run these checks before every single campaign drop.
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Conclusion
Address hygiene is not just a technical step. It is a critical way to protect your marketing budget. When you use CASS and NCOA processing, you eliminate the cost of printing and mailing letters that cannot be delivered. For campaigns sent across the USA, this simple data scrub makes the difference between a high-performing campaign and a waste of money.
By standardising your list, you correct spelling mistakes and add ZIP codes. You also update addresses for customers who have moved. This ensures your message lands in the right mailboxes. And it qualifies you for commercial bulk postage discounts that reduce your costs.
If you are planning your next direct mail campaign in the USA, do not leave your data to chance. Take a close look at your mailing list quality today.
Are you ready to save on postage? Call us today to clean your list and start mailing your letters. Let us help you get more calls and grow your business. Get Started Today: 1-866-508-5035
