S.C. Code § 38-53-30
No undertaking is invalid, nor may any person be discharged from his undertaking, a forfeiture be stayed, the judgment on the undertaking be stayed, set aside, or reversed, nor the collection of the judgment be barred or defeated by reason of any defect, omission, or failure to note or record the default of any defendant or surety, because the undertaking was entered into on a Sunday or other holiday or because of any other irregularity, if it appears from the tenor of the undertaking that the official before whom it was entered into was legally authorized to take it and if the amount of bail was stated.
The liability of a person on an undertaking is not affected by reason of the lack of any qualifications, sufficiency, or competency provided in any other law in this State, by reason of any other agreement whether or not the agreement is expressed in the undertaking, or because the defendant has not joined in the undertaking.
S.C. Code § 38-53-30