If the other party is properly served and does not respond to the Complaint within the time allowed, the plaintiff can ask for a default judgment.
The plaintiff can present the court with paperwork to award themselves what they asked for in the Complaint. They may need to present evidence to prove to the court that they are entitled to the damages they are requesting.
Self-help kit from the law library
The law library sells a Default Judgment in Superior Court kit with forms and instructions to ask for a default judgment in Superior Court. It is intended for cases against one defendant who did not answer or appear, and less than one year has passed since service of the summons and complaint. Kits can be purchased at the library or online and mailed out.
Responding to default
If a default judgment was taken against you because you did not respond to the Complaint, and you had a valid reason for not responding to the lawsuit, you may be able to ask the court to vacate that judgment based on Civil Court Rule 60 for Superior Court and for District Court.
Washington LawHelp has information and forms about this process for most civil cases in their Motion to Vacate Judgment/Order in a Civil Case packet. They have specialized information and forms for family law cases or for eviction cases.
Free eBook about representing yourself in court
Pages 74-75 pertain to default judgments