A bond is posted on a defendant's behalf, usually by a bail bond company, to secure his or her release. Pending Warrant. Defendants with pending warrants are usually not eligible for bail. Bail is not intended as a punishment in itself.
Anyone can post your bail bond. Usually you will go through a bail bondsman so you put up a small percentage of the bail, but you forfeit that once the bond a returned. To qualify you need to have credit and collateral. If your bail bond is $100K ...
And while some will tell you that you can't remain anonymous, the short answer is actually yes, you can. (But with one major consideration.) The Court is going to need a name and person to return the bond to once the court date has been successfully completed.
The defendant can post their own bail or ask a family member or friend to post it. If the defendant uses a bond company, the company may require the defendant to have a co-signer (someone who will help the company find the defendant should they fail to appear).
Bail information is considered public record in the State of California, meaning that anyone (not only defendants themselves) can request this info. The details can be accessed via the Public Access to Court Electronic Records (PACER) system or the Criminal Intake Section.
The court can grant bail after considering various factors, such as the nature of the offence, the evidence against the accused person, the likelihood of the accused person absconding, and the possibility of the accused person tampering with evidence or influencing witnesses.