Jorge Teixeira is attracting interest from overseas clubs, News Shopper understands.
Teixeira found first-team opportunities limited in the latter stages of the season after influential defender Jason Pearce returned from injury.
The 30-year-old Portuguese centre-back has three years left on his contract and is one of Charlton’s highest earners.
And Addicks boss Karl Robinson wants to trim the club’s wage bill to ensure he has enough firepower for the season ahead.
Teixeira was close to joining Belgian outfit Zulte Waregem last summer, but the move fell through on deadline day.
And sources have told News Shopper that clubs from abroad are now monitoring Teixeira’s situation.