Republic of Ireland boss Giovanni Trapattoni has delivered a strongly-worded warning to players not fully dedicated to their international career.
The Italian's outburst comes on the back of naming troublesome trio James McCarthy, Marc Wilson and Darron Gibson in his squad to face Croatia next month.
All three withdrew from the Republic's busy schedule at the end of the club season, during which Trapattoni guided them to their Carling Nations Cup success.
Also, a qualifying win in Macedonia was followed by a friendly defeat of Italy, all of which Trapattoni pulled off without such key players.
The Italian suggests their inclusion this time around is an act of forgiveness, but will cut all ties to any player who lacks "professional respect" in the future.
"This is the last time that those players will be allowed to behave like that. I don't want to be betrayed," Trapattoni told the Irish Independent.
"Yes, I know that these players are busy in their clubs. But I was a player, I was in the national team, and we always had the mentality for our club and country.
"My disappointment is that I always defend my players, and praise them for their attitude, for their pride, for their mentality.
"I put myself on the line all the time by defending them. Now they must answer us for this reason. I give them trust.
"That is very important. I've had some of the greatest players, and they have professional respect for their club and for their country.
"These players have to confirm they have the right attitude; otherwise I will have to take back everything I said about them."
One player who failed to earn a recall is Celtic striker Anthony Stokes, who also omitted himself from the summer fixtures, citing fatigue as a reason.
But whilst Trapattoni is prepared to send future offenders into international exile, he admits that the Republic 'need' the likes of McCarthy, Wilson and Gibson.
"There is one reason why I called them up," he added. "It's important that we build a squad, and there is a basis for a good squad in the future. We need these players.
"They have many games in their clubs and sometimes, okay, they are not happy to come and spend eight days with us.
"Okay then, stay at home. You don't want to come for a week with the national team? Okay, we know what players we have. We'll build another team."
Rather than confirm injury as a problem, though, Stoke midfielder Wilson failed to report for international duty in May - an act Trapattoni will not tolerate again.
He added: "This is the squad, and that is clear. There is an injury, or there isn't. But not disappearing - that's just bad manners."