If Some one Dont have a id can they use a passcode to ride on a bus

You do not need an I.D. to ride the bus.

Greyhound is a bus station.

What is the greyhound?

All they really care about is the confirmation number. I have rode the greyhound 3 times already. Only once have they ask for ID. And they never ask me for the password. But if u dont have your ID then its best to remeber your password. That can be an acceptable substitute for not having ID