CASS Mailing List Management & Dedup 2 — Questions and Answers
Question 1: Which USPS standard defines the match logic used during CASS-certified address deduplication?
- Delivery Point Validation (DPV)
- Coding Accuracy Support System (CASS) Cycle N
- Publication 28 — Postal Addressing Standards (Correct answer)
- Address Management System (AMS) Cycle O
Correct answer: Publication 28 — Postal Addressing Standards
Publication 28 establishes the official postal addressing standards that CASS-certified software must follow when validating and deduplicating addresses.
Question 2: When performing intrahousehold deduplication, which field combination is typically used as the primary match key?
- Full name + ZIP+4
- Delivery point barcode + household surname
- Delivery address line + ZIP code (Correct answer)
- City + state + first name
Correct answer: Delivery address line + ZIP code
The delivery address line combined with ZIP code identifies a unique delivery location and is the standard primary key for intrahousehold dedup.
Question 3: A mailer wants to suppress records that appeared on a previous mailing. This process is best described as:
- Merge-purge
- Nth-name selection
- Suppression file matching (Correct answer)
- List segmentation
Correct answer: Suppression file matching
Suppression file matching removes records from a current list that match records in a reference file of previously mailed or do-not-mail addresses.
Question 4: In a multi-list merge-purge, the process of retaining the best version of a duplicated record is called:
- Householding
- Survivorship logic (Correct answer)
- NCOALink processing
- ZIP+4 assignment
Correct answer: Survivorship logic
Survivorship logic determines which version of a duplicate record is kept based on criteria such as recency, completeness, or list priority.
Question 5: What is the primary purpose of applying NCOA processing before a deduplication run?
- To assign Delivery Point barcodes
- To update addresses with current move data before matching (Correct answer)
- To remove business records from consumer lists
- To validate ZIP+4 codes against the AMS
Correct answer: To update addresses with current move data before matching
Running NCOALink first ensures that moved individuals are updated to their new address before dedup, preventing false non-matches due to outdated addresses.
Question 6: A dedup match code of 'H' in most CASS-certified systems typically indicates:
- An exact name and address match
- A household-level match with different given names (Correct answer)
- A ZIP code match only
- A business name match at the same address
Correct answer: A household-level match with different given names
Match code 'H' conventionally denotes a household match where the delivery address is identical but the given names differ, suggesting different people in the same household.
Question 7: Which technique reduces duplicate mail pieces to the same household while still delivering one piece per address?
- List rental suppression
- Householding with one-per-household selection (Correct answer)
- Delivery sequence file (DSF2) walk sequencing
- Presort deduplication
Correct answer: Householding with one-per-household selection
Householding groups all records at the same address and selects one representative record, ensuring a single mail piece reaches each household.
CASS Mailing List Management & Dedup 2
Which USPS standard defines the match logic used during CASS-certified address deduplication?