Surety

Dictionary of Biblical Words:

This means one who is taking the responsibility due to another, as in endorsing a bill of exchange, &c. Christ is thus the sinner’s surety, taking upon Himself all the responsibility of his sine, and answering to God for them all. Humanly speaking suretyship is condemned (see Prov. 11:15), but without a Divine surety we all were lost.

Boyd’s Bible Dictionary:

(security). Suretyship in the older sense of pledge was regulated by the Mosaic law (Gen. 44:32; {vi 2139-2140}Ex. 22:25-26; {vi 5532-5543}Deut. 24:6-17). When Solomon opened Palestine to commerce, suretyship took the forms of general law and trade ({vi 16542;16704;16892;16971;17042}Prov. 6:1; 11:15; 17:18; 20:16; 22:26). [LOANS.] [PLEDGE.]