Generally, a bond forfeiture would just revoke liberty and have the defendant return to jail pending trial. So no, a bond forfeiture is not analogous to "guilt" or conviction. in lieu of conviction is "in place of" or "instead of," so alone, that is not a conviction either.
If you start communication with both your bondsman and the court as soon as possible, your court date will, in most cases, be reset, and the forfeiture of your bond will be recalled. However, if you do not get back in touch with your bondsman or the courts, the warrant for your arrest will remain active.
(g) If the accused does not comply with the conditions of the bail bond the court having jurisdiction shall enter an order declaring the bail to be forfeited. Notice of such order of forfeiture shall be mailed forthwith to the accused at his last known address.
The legal implications of bail bond forfeiture can be severe. Beyond the financial loss, the defendant may face additional charges for failing to appear in court, complicating their legal situation.
Bond forfeiture means that the person loses the guarantee made by the bail bond company on their behalf. There are some circumstances in which the judge might excuse the accused for missing court and bail or bond can be reinstated. This process is called remission.
If you were arrested in California, this state allows the reinstatement of bail bonds. There are many reasons you may violate the terms of your initial agreement – some of which can be out of your control, like a sudden sickness.