REG Suretyship · Updated November 2026
Suretyship: Who Pays When the Debtor Does Not?
Identify the principal debtor, creditor, and surety first, then analyze writing requirements and defenses.
Three parties
Suretyship involves the principal debtor, the creditor, and the surety or guarantor.
Writing requirement
Suretyship promises commonly implicate the Statute of Frauds, subject to exceptions.
Main-purpose exception
If the promisor's main purpose is to obtain a personal economic benefit, the writing analysis can change.
Defenses
Changes to the underlying obligation, impairment of collateral, creditor conduct, and other facts can affect a surety's defenses or liability.
Reimbursement
A surety who pays the creditor can acquire rights against the principal debtor.
The takeaway
Identify the three parties first. Then test the writing requirement and defenses.
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FAQ
Is suretyship potentially within the Statute of Frauds?
Yes.
Can a surety seek reimbursement?
Potentially.
Does every modification leave the surety unaffected?
No.