If you don't go to the hearing of the application to set aside default judgment, the court will only have the judgment debtor's side of the story when deciding whether to set aside the default judgment and if costs are to be ordered.
The judgment debtor will usually be directed to file a Defence within 14 to 28 days. The court will send you a copy of the Defence.
After the judgment debtor files the Defence the case will be listed for Pre Trial Review. For more information see
Pre Trial Review - Step by step guide.
If there is any doubt whether the judgment debtor was served with the Statement of Claim, the court is likely to set aside the judgment. The court may set aside the judgment if there is any evidence that there is a good reason why the judgment debtor did not file a Defence within 28 days of being served with the Statement of Claim.
It is important that a person does not have court orders made against them without knowing about the claim, or without having a chance to give an explanation to the court.