Moritz made the decision after Palace boss Ian Holloway couldn't guarantee regular first team football.
Moritz told The Bolton News: "With Palace, just after the play-off final, I had agreed with the chairman and Ian Holloway to set everything up for the next season. I went back to Brazil and had my holidays.
"Palace I felt was home. That was the thing about the team there last season, they were almost like family.
"When I came back I went in to sign the deal but had a last-minute meeting with Ian Holloway and he started to explain how he would play this season. He said he would not use a number 10 or a playmaker and he wanted to chase the ball. That is not the kind of player I am.
"I didn't see myself playing very much in his team and he was very honest. I appreciated that from him. He said I would be a good player to be on the bench, but for me that was not enough.
"It was a surprise. Even my agent was outside the door and asked when I left 'have you signed?' and I said 'no' and walked through the doors."
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