If a person has made wudhu, and when the next prayer comes he does not remember if he broke his wudhu, then he can pray without making wudu, but if he forgot if he ever made wudhu, then he should perform the wudhu again
If a person has made wudhu, and when the next prayer comes he does not remember if he broke his wudhu, then he can pray without making wudu, but if he forgot if he ever made wudhu, then he should perform the wudhu again