There are 4 types of credibility when it comes to website credibility. These are the 4 types with an example for each.
Presumed
http://www.education.wa.edu.au/home/detcms/portal/

(Dept of Education,2016)
A great example of presumed credibility ( when you assume it’s a credible website due to how well known it is) with websites, is a government website such as the Department of Education. As shown above, this website is assumed to be credible as it is kept up to date, there are no ads or viruses, it has a clean and effective design, it features contact information and is usable.
Reputed

(Twitter,2016)
Reputed credibility, which is when its a third party reference ( you know someone who uses it so you feel more inclined to use it yourself), can be shown through a popular website such as Twitter, pictured above. This has a simple yet effective design and since people hear so much about it everywhere, they are more likely to use it and assume its credible since it caters to many people all over the world.
Surface

(Ohana Swim,2016)
Surface credibility basically means what you come to find on a quick simple look at a website. An example of this would be a Bikini store called Ohana Swim. From first glance it ticks all the right boxes with a contact link, a search link, about us page and secure payment services.
Earned

(CommBank,2016)
Earned credibility is when you have personally had a great (or bad ) experience with a website and therefore judge its credibility based on that. Personally the CommBank website has been very trustworthy and usable since the day I first started using it and have never had any problems. Therefore I view it as a credible website.
References
CommBank,. (2016). CommBank. Retrieved from https://www.commbank.com.au/
Dept. of Education,. (2016). Dept of Education. Retrieved from http://www.education.wa.edu.au/home/detcms/portal/
Laja, P. (2012). 39 Factors: Website Credibility Checklist. ConversionXL. Retrieved 29 May 2016, from http://conversionxl.com/website-credibility-checklist-factors/
Ohana Swim,. (2016). Ohana Swim. Retrieved from http://ohanaswim.com.au/
Twitter,. (2016). Twitter. Retrieved from https://twitter.com/?lang=en