Different Valid, Forged, Dropped and Fake Pagerank

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 Valid Pagerank

• Domain age more than 3 month (based on paid review rule)
• At top result on google search. 

Forged pagerank

• The Domain already have valid PR before popularity or index in google is gone.
• Not limited by domain age.
• Not at first place google search result.
• Some domain was left by the owner (not renewal), PR can hold on if google not make any update pagerank check.

 

Dropped Pagerank

• This domain has a PR but not extended by the previous owner and on the waiting list for the delete before someone buy it.
• Have different date between web-archived and whois start date.
  

Fake Pagerank

•  The easist way to see fake PR, age less than 3 month and have high pagerank.
• When search in google with "info:domainname" the result is different name show up. 

Additional info :
Someone says that forge is a process and fake is result.

original article : adsense-id.com