If the defendant refuses to appear, the court may issue a default judgment.
Tips
usage
应 here is yìng (4th tone, 'to respond'), not yīng ('should'). Pairs with 起诉 (to sue): 起诉方 sues, 应诉方 responds. An out-of-court 'acceptance of service' is 受诉; actually stepping up to defend is 应诉.