Using Google's API requires displaying a map and also prohibits automated requests, but it's worth noting that other APIs like Mapquest/Nominatim can be helpful with caution.
When suggesting international addresses to users, accuracy may be sacrificed for ease, as the handling of official records differs by country and not all countries provide easy access to query their records.
At SmartyStreets (based in the US), we specialize in CASS-Certified US postal address verification, ensuring that the suggestions we provide are only accurate addresses. Other platforms like Google, Yahoo, and MapQuest may offer address approximation rather than validation, leading to potentially invalid results without your knowledge.
Consider these points when dealing with address-related inquiries, especially for US-based addresses where we can offer comprehensive assistance.