How to Prepare Mailing Lists for High-Volume Distribution / by Cade Hudgins

Preparing a mailing list for high-volume distribution is one of the most important steps in achieving an effective direct mail campaign. TPSi ensures accuracy, compliance, and deliverability by performing NCOA (National Change of Address) updates, CASS and PAVE certification, and full USPS verification for every list processed. This process minimizes undeliverable mail, improves targeting, and maximizes return on investment.

Step 1: Collect Accurate Data

Begin by sourcing contact data from reputable sources, including customer databases, CRM exports, or purchased lists from verified vendors. Ensure all fields such as name, address, city, state, and ZIP Code are complete and formatted consistently. Incomplete or inconsistent data can result in delivery issues and wasted postage.

Step 2: Standardize and Verify Addresses

TPSi standardizes every address according to USPS formatting requirements using CASS and PAVE-certified software. This process ensures each address is recognized by USPS automation systems, qualifying the list for discounted postage rates and faster delivery.

Step 3: Update with NCOA Data

All TPSi mailing lists are automatically processed through the National Change of Address (NCOA) database. This updates records for recipients who have moved, ensuring that mail reaches the correct destination and complies with USPS Move Update standards.

Step 4: Remove Duplicates and Invalid Records

Duplicates and invalid addresses increase postage costs and reduce campaign efficiency. TPSi performs automated deduplication and address validation on every list, ensuring each recipient receives only one mail piece and all entries meet USPS address quality standards.

Step 5: Segment and Target Strategically

Effective segmentation improves response rates by tailoring messages to specific audiences. TPSi can segment lists by demographic, geographic, or behavioral criteria to align mailings with campaign goals. This targeting approach is especially useful for combining targeted mail with EDDM (Every Door Direct Mail) when appropriate.

Step 6: Test and Approve Before Mailing

Before large-scale distribution, review a test sample to confirm all data fields, addressing formats, and segmentation logic. TPSi provides test proofs and reports to verify list integrity prior to production, ensuring a smooth and compliant mailing process.


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