CASS Software Certification & Testing 3 — Questions and Answers
Question 1: What is the role of the Address Management System (AMS) in relation to CASS-certified software?
- It provides the authoritative USPS address database that CASS software must reference (Correct answer)
- It assigns CASS certification scores to software vendors
- It processes mailer complaints about incorrect address corrections
- It manages physical mail routing at sectional center facilities
Correct answer: It provides the authoritative USPS address database that CASS software must reference
The AMS database is the USPS master address file that CASS-certified software licenses and uses to validate and standardize addresses.
Question 2: A mailer's software achieves a 98.5% match rate on residential addresses but only 91% on business addresses. What is the most appropriate next step?
- Investigate why business address formats are causing lower match rates (Correct answer)
- Submit the mailing using only the residential records
- Request a USPS waiver for the business address category
- Re-run the entire file with a different CASS vendor
Correct answer: Investigate why business address formats are causing lower match rates
Diagnosing the root cause of the lower business match rate — such as suite number formats or common business address patterns — is the correct quality improvement step.
Question 3: Which of the following best describes 'LACSLink' as it relates to CASS processing?
- A USPS service that converts rural route addresses to city-style addresses (Correct answer)
- A system that links duplicate records across multiple mailing lists
- A tool that validates P.O. Box addresses for bulk mailing eligibility
- A database of last address changes for recently moved residents
Correct answer: A USPS service that converts rural route addresses to city-style addresses
LACSLink converts old-style rural route addresses to new city-style addresses resulting from the E-911 addressing systems.
Question 4: When CASS software returns a ZIP+4 code, how many total digits does the complete ZIP code contain?
- 9 (Correct answer)
- 5
- 7
- 11
Correct answer: 9
ZIP+4 codes combine the 5-digit base ZIP with a 4-digit add-on code, totaling 9 digits (typically formatted as 5 digits, a hyphen, and 4 digits).
Question 5: In CASS testing methodology, what does the term 'standardization rate' measure?
- The percentage of addresses reformatted to USPS standard format (Correct answer)
- The frequency at which the CASS database is refreshed
- The ratio of certified vendors to total address processing vendors
- The percentage of ZIP Codes updated during a cycle
Correct answer: The percentage of addresses reformatted to USPS standard format
Standardization rate measures how many input addresses the software successfully converts to the USPS-approved standard format.
Question 6: Which type of testing would verify that CASS software correctly handles an address input with a misspelled street suffix (e.g., 'Stret' instead of 'Street')?
- Fuzzy matching / input normalization testing (Correct answer)
- Boundary value testing
- Load testing
- Integration testing
Correct answer: Fuzzy matching / input normalization testing
Fuzzy matching or input normalization testing verifies the software's ability to recognize and correct common misspellings and abbreviation variants.
Question 7: How often does the USPS require CASS-certified software to be re-certified to maintain its certification status?
- Every cycle (approximately every two years) (Correct answer)
- Annually
- Every 90 days
- Every six months
Correct answer: Every cycle (approximately every two years)
CASS certification cycles run approximately every two years, and software must pass each new cycle's testing to retain certification.
CASS Software Certification & Testing 3
What is the role of the Address Management System (AMS) in relation to CASS-certified software?