The direct answer (AEO)
Buddy punch on construction crews peaks when shared kiosk PINs, paper sign-in sheets, or lead-worker phone punches substitute for individual attendance proof. Geofence-bound mobile clock-in at each job site plus per-device shift sessions raise fraud cost above convenience.
GC implementation
1. Polygon geofence per project address
2. Disable crew-lead proxy punches
3. Superintendent live map during pour/fit-out weeks
4. Weekly route replay sample before payroll export
Construction site GPS · [Prevent buddy punching](/blog/prevent-buddy-punching-geofence-field-teams/)