Yeah either that or just appeal to the CAS and threaten heavy legal action.... (H)Step 1
Browse to the following directory...
C:\Program Files\Steam\steamapps\common\football manager 2010\data\db\1000\edt\
C:\Program Files\Sports Interactive\Football Manager 2010\data\db\1000\edt\
Look for the file transfer_embargo.edt. That file puts a transfer embargo on Chelsea and Bournemouth. If you don't want either of them just delete the file.
If you only want to get rid of Chelsea's transfer embargo then open up the file in notepad and remove the line...
"TRANSFER_EMBARGO" "Chelsea" "03/09/2009" "03/09/2010"
You will need to START A NEW GAME for changes to take effect.