I don't understand what is the problem?
I know they are working with the bank, and in 2013 many banks have changed the requirements for client's documents.
I guess this is the reason that OKPAY changed the requirements too.

A similar thing happened with my business. Last year, my insurance company in one day made ​​terrible changes in the requirements for the client's documents. It almost killed my business.
I had to change the terms for a half of my customers, some of them refused to work with me, but I could not do anything...