You can withdrawl your agreement by calling the bondsman and telling them that you no longer want to be on the bond as you feel the ``criminal'' will not show up to court. You can sign off of the bail but they may arrest your friend.
Bond Duration Explained Bail bonds in California are valid for the life of the cases unless you miss court or get rearrested. Then, depending on the circumstances, you may need to post another bond.
By becoming a co-signer, you can assist your friend, loved one, or relative during their court process and get them out of jail as soon as possible. In fact, a co-signer is mandatory in order to guarantee the bail bond, and your help could be instrumental in the defendant's release.