A formal promise by one party (the guarantor or surety) to another party (the creditor) to accept responsibility of a third party’s (the principal debtor) debt, if that third party cannot or refuses to pay it.

A period immediately after the deadline for the performance of an obligation during which a late fee or penalty, or other action would have been taken as a result of failing to meet the deadline, is waived provided that the obligation is satisfied during the grace period. Grace periods can range from a couple of minutes to a number of days or longer, depending on the context, and can apply in various situations, such as complying with a legal obligation by a specified deadline.