How to verify a fitter is legitimate: licences, premises and paper trail
Documentation matters most in the failure case. If a wheel comes loose because lug nuts were not torqued, or a fresh tyre fails and causes damage, your route to compensation runs through the provider's commercial identity and their liability insurance. Licensed garages carry insurance precisely because wheel and tyre work is safety-critical; an unlicensed operator with a borrowed compressor carries nothing. This is one of the quiet advantages of booking through a platform that vets its vendors: tamam lists verified providers with transparent AED price ranges, and the booking, payment and job record all live in the app, which means there is always a documented trail of who did what to your car and when.
A last practical check is behavioural rather than bureaucratic. A competent fitter uses a torque wrench for final tightening rather than hammering the impact gun to maximum, resets or checks the TPMS after the job, sets pressures to the placard on your door jamb rather than a generic number, and tells you unprompted to re-check torque after the first 50 to 100 kilometres. Any one of those habits is a good sign; all four together mean you have found your regular, and same-vendor rebooking exists for exactly that moment.