If you do not file an answer within those 30 days the creditor will ask for and receive a default judgment. (marin-bankruptcy-law.com)
After your spouse receives service, your spouse has 30 days to respond to the divorce petition by filing an answer with the court. (info.legalzoom.com)
Once the filing spouse serves the divorce petition on the responding spouse, the responding spouse must file an answer with the court. (info.legalzoom.com)