Invitation system

An invitation system is a method of encouraging people to join an organization, such as a club or a website. In regular society, it refers to any system whereby new members are chosen; they cannot simply apply. In relation to websites and other technology-related organisations, the term refers to a more specific situation whereby invitations are sent, but there is never any approval needed from other members. Popular alternatives to this specific version are open registration and closed registration. Open registration is where any user can freely join. Closed registration involves an existing member recommending a new member and approval is sought amongst the existing members. The basis of the invitation system is that a member can grant approval to a new user without having to consult any other members.

Existing members may receive a set number of invitations (sometimes in the form of tokens) to allow others to join the service. Those invited to a website are typically sent either a specialized URL or a single-use pass code.


Invitation systems for websites are usually temporary. They are typically used for services in private beta testing, in order to control the number of users on the service. In other cases, they can be used due to limited availability of server resources. There are a growing number of sites which use invitation systems on a permanent basis to create exclusivity and to control quality of user-generated content.[1] Rarely, they may be used on a permanent basis in order to aggregate social network statistics (all users will ultimately have a traceable connection to all others). They are sometimes used to avoid abusive types or spammers, by relying on mutual trust between all members.

Other Languages
العربية: نظام الدعوة
svenska: Invit
中文: 邀请码