radio code

hello'please i am a honda/acura mechanic,i need somebody who will deliver me from the hoocks of my customers who does not have code number to their car radio before bringing it for servicing,having removed the battery their radio will display 'code' and they usually make trouble with me.how do i get them these codes with radio serial number. please help me, even i have two cases presently one honda serial;11101082 with its navigation serial;fjb26003146 then acura radio serial ;30015099.please i need somebody to help me out.THANKS
e-mail;[email protected]

for most people, they have to contat a honda/acura dealer to get the code. Personally I think it's retarded. Look in the paper work that came with the car and in the glovebox next to the center console.