Certify Google My Business profiles - Google Partner Certification required -- 3

We are a company (physical crypto exchanges) with many google maps businesses. We create a business profile in Google my Business for our stores where we sell and buy cryptocurrencies, and we also create a business in Google my Business when we place a cryptocurrency ATM, for example, in a mall. To have a google my business profile completed, Google sends you a letter with a code to the address provided in the Google my Business profile. That code allows to certify the profile. Our problem is that most of these letters take way too long to arrive, specially when we have to certify a profile of a ATM placed in a mall (as the postman doesn't know where to send the letter). We understand that this would be way easier if a Google Partner help us find another way to certify our Google My Business profiles.