They're not supposed to leave them unattended, unless you have specifically pre-authorized that or left a signed note for the driver. Normally if you aren't home they would be held for pickup...

... or at least that's what happens in Canada.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8