Synthetic addresses are useful because they look like real addresses without belonging to a real household. They are for form testing, mockups, seed data, and demos.
Pick the right fixture
Use a country-specific fixture when you test field order, a tax-free state fixture when you test a checkout message, and a batch fixture when you test CSV import or pagination.
Test the round trip
Fill the form, save, reload, export, and re-import. Check that the unit, leading zeros, and country-specific fields survive every step.
Label the boundary
Do not use a synthetic address for identity verification, account signup, or a real shipment. Add a note to the test data so the next person knows it is not deliverable.
Questions
- They are fine for design and testing. Using one to impersonate a person or bypass verification is not.
- Yes, if the demo is clearly labeled and does not imply that the address is real or deliverable.
Are synthetic addresses legal?+
Can I use a synthetic address in a demo?+
Examples are synthetic. Do not use a generated address for identity checks, account registration, or delivery.