There are 2 best tools to detect fake PR I think: one is seologs: http://www.seologs.com/pr-check/pagerank.html Another one is: http://www.database-search.com/sys/pre-check-en.php Also you need check if goolge has cached it or not. You can use this command: cache:www.yourdomain . com at google search bar.
You moan really loudly and.... OK, seriously, to fake PR a webmaster can 301 redirect a website to a high pagerank website. Then you cloak that so that only Googlebot sees the 301 redirect, but not visitors. Google then returns the pagerank of the high pagerank website, rather than the appropriate pagerank.
..... SCAM Alert, fake PR and charging people for submission. ... Mod better to close this thread i think.
I think any one here should always check out on these www.checkpagerank.net and www.seologs.com for fake page rank tool as some webmasters may be duped into submitting into these Fake page rank directories