Bail bond co-signers have a very important role in the release of a defendant. Their role can often also be mentally stressful.
Co-signers are often needed to secure a bail bond. Without a co-signer on a bail bond, the defendant will remain in jail. When a defendant does get a co-signer on their bail bond, then the co-signer has his or her money, valuables, and other collateral at risk. The co-signer must ensure that the defendant shows up for court because if they do not, the collateral that they pledged can be claimed by the bail bond company.
Naturally, the co-signer has rights as well. Most importantly, he or she can withdraw their signature from the bail bond at any time, without consequence to themselves. Of course, the consequence to the defendant is that they would be taken back into custody until they can get another co-signer.