Your problem: - you are a part of a self organising body, - the body pays to all staff a daily allowance based on presence and attendance, - on work days everybody signs in, - majority of you agree that there must be some accountability, - everybody wants to avoid embarrassment and losing face, - most agree that there must not be a physical presence that would authenticate people at the sign-in, so no individuals delegated to make the assessment on the spot (see the previous point).

You have already tired (a) paper forms and determined that they are fraudulently sign in, (b) named RFID badges and determined that individuals with other names check in.

Next step - hide the security authenticating people inside a small machine that would do the work of a paid security official at the sign-in desk.