Many of these aliens are criminals who have served time in our Federal, State, and local jails. The presence of such individuals in the United States, and the practices of foreign nations that refuse the repatriation of their nationals, are contrary to the national interest.
If the defendant has made court appearances as required, cash bail should be returned at the end of the case. When the case is over, the judge should issue an order for the return of bail (exonerating the bail). The New York City Department of Finance will issue a check to the person who deposited the bail.
Generally, if you show up to court when you are supposed to after being let out of jail, the court will return your bail. However, if you do not show up, the court will keep your bail and most likely issue an arrest warrant for you, meaning you'll probably end up back in jail.