It doesn't matter. It's just that the invigilator is afraid that someone will sneak the test paper out of the examination room. Actually, it's all the same whether you sign it or not. Just for the convenience of the invigilator. If the final test paper is not enough, they will check it.

Although I asked to sign the test paper, many people didn't sign it. I took CET-6 several times and didn't sign it once. I am in a hurry and always forget, but my final score is normal and has not been affected. Hehe, don't worry.

However, if you forget to mark the type of test paper on the answer sheet 2, it will be a big problem. However, the invigilator will check the papers one by one after handing them in, and there will be teachers to help supplement them. If you meet an unscrupulous invigilator, forgetting to mark the test paper type will lead to the invalidation of answer sheet 2.