Section 568
When Contract Of Guarantee Can Be Voided
In any of the
following circumstances, the surety may have the contract of
guarantee voided:
(a) If the guarantee is obtained by the creditor or by any
other person with his or her consent by supplying
misleading or false notice or information to the surety
about the matter of the transaction for which the
guarantee is given,
(b) If the matter of guarantee, property or fact is concealed
or not disclosed,
(c) If the contract is concluded on the condition that a third
person will also become the surety but the third person
does not consent to give the guarantee.