§ 2788 Surety Without Principal Consent

• •You can promise to pay someone else's debt without them knowing.
• •You don’t need their permission to make this promise.
• •If they don’t pay, you might have to.

Your friend borrows money from a bank, and you tell the bank, 'If my friend doesn’t pay you back, I will.'

Even if your friend didn’t ask you to do this or doesn’t know about it, you still have to pay the bank if your friend doesn’t.