Blog
Practical reading on US sales tax, address validation, and test data — written for
developers and QA engineers using the
tax-free state address generator.
June 26, 2026 · 8 min read
A deep-dive into the NOMAD acronym — New Hampshire, Oregon, Montana, Alaska, and
Delaware. Why each state ended up tax-free, the local exceptions that catch unsuspecting
buyers (especially in Alaska), and why this matters for e-commerce checkout testing.
June 26, 2026 · 9 min read
The two validation layers that reject your test fixtures: USPS ZIP-city-state matching and
the payment network’s Address Verification System. A practical guide with the AVS
response code table and Stripe sandbox examples for testing each case.