Investigation PTC Sites

Here is some tips to investigate a PTC site

1. Check regularly the forums of the PTC sites, mainly the news and announcement section. Also look at the prob and doubt category in the forum and see whether the Admin of the PTC answering or not. If he answering then well and good but if not then I think you know it better.
2. Always check total payout of any PTC site if it is increasing then its all right but if not increased daily then there is some problem and the site may be scam very soon. But if the admin is not present or if he/she go for a tour then also it can happen. So if any legit site not paying for long days that not indicate always that the site scam. Most Admin are send Message when they go for a tour so dont ignore the messages also.
3. There are many PTC investigation sites like http://ptc-investigation.com/default.aspx from where you can easily found the scam PTC sites. You can find more by a google search
4. Try to know the Admin name of a PTC site so that you not scammed again by any previous scammed Admin.