Google uses a postal-card OTP for Google MyBusiness service, to verify address for business listings. That is how you create Google Maps and Google Plus pages h

Google uses a postal-card OTP for Google MyBusiness service, to verify address for business listings. That is how you create Google Maps and Google Plus pages https://business.google.com https://business.google.com). They again re-verification if the business address changes. I think it is a very smart & less cumbersome way to verify physical address.