is there an alternate Google my business verification?
 

Is there any other way of getting local business verification in particular location.
What if in certain cases like if someone has business market in location where physical presence is not there. I hope people got my point.

Contact google for more support

Log in to Google My Business. Use the same account you used to request the postcard.
If you're managing multiple businesses, choose the one you'd like to verify.
Click Enter code on the blue banner on the top of the screen and follow the prompts to complete verification.

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Ezcorts in London

It is kinda confusing that you have a certain location but there is no physical address? What do you mean by that? can you elaborate more on this? You mean to say your business operates online only?