Verification code[ Edited ]
You need to request the card to your actual address and wait at least two weeks. When it dosn't come, you need to contact support and they will assist you with getting verified.
To get in touch with Google My Business Support ou need to:
1- log into your Google my business dashboard http://www.google.com/mybusiness
2- select support from upper left hamburger menu
3- a help screen will appear to the right
4- It used to be just a scroll down to contact us under Contact Us
5- Scroll down and select Need More Help
6- Select the specific problem - in your case Verification
7- Select I requested a postcard more than 14 days ago
8- Scroll to the bottom of the page and choose most appropriate contact method for you (some are not always available)
As a note, during the two week period of waiting be sure NOT to edit your listing otherwise you will need to start over.