Out of state buyers agent

[Alexander Monnin]

Hypothetically, if I was a real estate agent and had a friend from a different state who was buying a property there, could I be his buyers agent (assuming I have a licence for that state) without ever having to go to that state.  If its not possible please list why I would have to travel to the other state. I'm just thinking about the opportunities if I were to get a license, Thanks in advance.