aakk9999 - 9:34 am on Oct 14, 2013 (gmt 0)
But if your business is purely online and there is no physical address
If it is a business, there must be some kind of contact. I agree with posts above - I would never buy from a business if there is no contact info. What happens if I am not happy with the product? Or if product does not arrive? Who do I contact? Where do I complain?
And even though there is no physical shop, there must be some office address - even if the contact info says "Registered office" or "Administrative office" to make it clear it is not a "walk in" shop.
It would not surprise me that, should the site be classified as transactional, Google looks into whether contact info exists.
You may test this however - just add contact info (not just email, but also the office address and phone number) to one of sites and see if rankings improve.
If you decide to do so, do come back and report your findings.