Legal Definition
A guaranty is a formal promise or undertaking by one party (the guarantor) to ensure that another party (the principal debtor) will fulfill the obligations under a contract, typically a loan or debt agreement. It serves as a guarantee of financial responsibility and often involves a legal obligation for the guarantor to step in if the primary borrower defaults.
Plain-English Translation
Imagine a promise where one person guarantees that another person will pay back a debt. If the person who guaranteed it doesn't pay, they have to make sure the original borrower pays their share. It’s a legal guarantee of financial backup.