In a notice that's spreading among fans, SM Entertainment Japan is reported to have made the below post to SONE Japan on October 10:
"Thank you very much for your patronage of official Girls' Generation fan club SONE JAPAN. Girls' Generation members Tiffany, Sooyoung, and Seohyun have finished their contracts with SM Entertainment. Future Girls' Generation activities are being decided carefully by consulting with the members. There's no intention of disbandment at this time. We'll notify you about future SONE JAPAN activities once progress has been made. We apologize for causing you concern. Girls' Generation continues on, and thank you for being SONE JAPAN."
Stay tuned for official confirmation from SM Entertainment.