Reception by Baptism means there is no need for confession and absolution. But people sometimes ask to make a life confession beforehand and I think they should be allowed to do so. But there is no absolution since Baptism washes away all sins.
Reception by Chrismation involves a life confession before the ceremony, either immediately before or a day earlier if that is more convenient. Absolution in not given following this confession. Instead it is held over and comprises the very last prayer recited over the newly Chrismated person at the end of the ceremony of Reception, after the Renunciation of errors. profession of the Creed and Chrismation.
This is the practice of the Russian and Serbian Churches. Generally speaking their Service books are identical. I cannot speak for Greek or Antiochian Orthodox practice.