Simple English definitions for legal terms
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An adpromissor is someone who promises to pay back a debt for someone else. This was a type of contract in ancient Rome where the adpromissor would only be responsible for the exact amount owed by the debtor. There were different types of adpromission, but they all involved a person agreeing to be a surety for someone else's debt.
Definition: An adpromissor is a type of surety in Roman law who promises to be liable for a debtor under a stipulation. Adpromission is a suretyship contract in which the surety promises to be liable for no more than the debtor owes.
Example: In ancient Rome, if a person borrowed money from a lender, they could ask someone to be their adpromissor. The adpromissor would then promise to pay the lender if the borrower could not. For example, if Marcus borrowed 100 denarii from Lucius, he could ask his friend Titus to be his adpromissor. Titus would then promise to pay Lucius the 100 denarii if Marcus could not.
This example illustrates how an adpromissor acts as a type of guarantor for a debtor. The adpromissor is responsible for paying the debt if the debtor cannot, which provides security for the lender.