TOS - Terms of Service - are rules by which one must agree to abide by in order to use a service. In regards to PTC websites, TOS is an important document, which you must read before you join any website. In TOS you will find out about payment rules, account and referrals rules etc. Please read TOS carefully, as some PTC websites mention in TOS that they do not pay at all or pay with big delays and restrictions. Please read Getrefmail.com website TOS Payments section as an example. If you have read this TOS before you start working with this scam website you would never register there. A TOS violation can result in myriad consequences towards those who are guilty depending on the service and the severity of the violation.