Scott's military file is stamped "dishonourable discharge". Since he's American it should be spelled "dishonorable".
When Scott, who was registered at the hotel as Mr. Langly, was in bed with the waitress and heard gun fire, he threw the waitress off of him to investigate and the waitress not knowing what was happening, protested and called his name Scott. She found him by the receipt in the bar which would/should have had his room number and undercover name not Scott. However, this assumes that his registered name was not "Scott Langly" as Stonebridge only calls him "Mr Langly" it is a likely possibility.