The Samoa Rugby Union plans to discuss concerns about refereeing and the disciplinary process at the World Cup with World Rugby.
The Manu failed to reach the knockout rounds after losses to South Africa, Japan and Scotland in pool play.
Vice-captain Alesana Tuilagi was controversially suspended for five weeks, later reduced to two on appeal, for kneeing a Japanese player while carrying the ball.
Their final pool match ended with Scotland scoring a controversial try to win the game.
Samoa Rugby Union chief executive officer Faleomavaega Vincent Fepuleai said they will raise their concerns after the tournament.
"The refereeing from our point of view hasn't been that great and we will continue to press for those issues, in terms of the way the tier two nations have been treated and respect," Fepuleai said.
"It's not going to really alter the results as such but we wanted to voice our concerns from the Samoan Rugby Union's point of view, in terms of some of the judiciary issues that's been handed down to some of our players."
The Samoa Rugby Union is also on the lookout for a new head coach, following Stephen Betham saying he he would step down after four years in charge.