If a respondent fails to file a notice of defense to an accusation by the ABC Bd., it may act based on its own evidence. However, the ALJ has discretion to hold an evidentiary hearing even if no notice of defense is filed, and the board may vacate a decision if a motion requesting relief for inadvertence, surprise or excusable neglect is filed within 7 days after service of a decision based on the defendant’s default. Given the short time limit, the evidence showing good cause needn’t be served with the motion. Here, a timely motion was served. Respondent claimed it never received notice of the accusation though the board mailed it to the address on file. That was an adequate showing of good cause even if the board had properly served the notice.