How do I prevent two members from record fake exchanges and exploit real worker members.

in CW 2 Coordinators Helping Coordinators


I am new to timebanks, I was watching the presentation videos on youtube and I was wondering if the timebanks system would be exploited if two members record fake exchanges to get tons of time credit and spend it with other real worker members?

Sorry if my question sounds a bit paranoid but I would like to know how to prevent this sort of exploitation.