We believe that all who confess their sin receive forgiveness and justification, for Jesus pleads His blood for everyone who repents. 
1 John 1:9; 2:1 – 
If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness… My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous.

“He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy.” 
Proverbs 28:13 – 
He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy.

“The Lord does not require us to do some grievous thing in order that we may have the forgiveness of sin. We need not make long and wearisome pilgrimages, or perform painful penances, to commend our souls to the God of heaven or to expiate our transgression; but he that confesseth and forsaketh his sin shall have mercy.”

“True confession is always of a specific character, and acknowledges particular sins. They may be of such a nature as to be brought before God only; they may be wrongs that should be confessed to individuals who have suffered injury through them; or they may be of a public character, and should then be as publicly confessed. But all confession should be definite and to the point, acknowledging the very sins of which you are guilty.” – Steps to Christ, pp. 37, 38.