The usual clues are there. The domain, riverbanksuniversity.com, was only created in February this year. The pictures of their "faculty" members are stock photos, not the people they claim to be. They're also the same pictures used by other known fake universities.
They claim accreditation by UCAIS but this isn't true.
The best evidence though is this chat I had with their online advisor this morning.
You are now chatting with 'Advisor'Isn't that all you need to know?
Advisor: Hello there
Richard Harriman: Hi
Richard Harriman: Can you tell me where Riverbank University is based?
Advisor: its an online university
Advisor: The admin office is in San Francisco, CA
Richard Harriman: Ok
Richard Harriman: I have a Bachelors degree in Psychology, how quickly can I get a Masters in Psychology?
Advisor: Where did you get Bachelors Degree completed from and when ?
Richard Harriman: University of Birmingham in the UK, 1985
Advisor: That is great
Advisor: And what experience you hold in Psychology ?
Richard Harriman: I worked in the health sector for 9 years, then in business since then
Advisor: That is great
Advisor: You can certainly apply for a Masters now
Advisor: The process will take 10 working days for you to receive the documents
Richard Harriman: How long does the course take?
Advisor: Have you filled in the application already ?
Richard Harriman: No
Advisor: Its an instant program that you are applying for
Advisor: Its an experience based program
Advisor: not where you would take classes
Richard Harriman: Wow, so I just get the degree?
Richard Harriman: No exams?
Advisor: What we do is we take down your life experience, that is your working experience and your past educational qualification, convert them into credit hours, if these credit hours are equivalent to the credit hours that are require to complete your desired degree then you qualify and we award the degrees accordingly, if you are successfully evaluated we start with the registration process registering you and your documents with the university and the Accreditation bodies and after that we make sure that the documents are shipped out to you in the next 10 working days.
Advisor: do you understand the process ?
Richard Harriman: Yes, thanks
Advisor: If you wish I can help you earn your Masters Degree
Richard Harriman: How?
Advisor: I can get you registered
Advisor: Your profile will be created first
Advisor: then you will be required to email me your CV / Resume
Advisor: The fee for the process will be $298
Richard Harriman: So I get a Masters degree for just $298?