(Matthew 6:14, 15) “For if you forgive men their trespasses, your heavenly Father will also forgive you; 15 whereas if you do not forgive men their trespasses, neither will your Father forgive your trespasses."
(2 Peter 3:9) "Jehovah.....desires all to attain to repentance."Seems pretty clear exactly who a Christian should confess their sins to and ask for forgiveness.
Haven't found a scripture yet which says a Christian should ask 3 elders for forgiveness - still looking!