Joint liability guarantee. Guarantors must have full capacity for civil conduct and the ability to pay off debts on their behalf, and cannot be used as multiple guarantors or the same guarantor in the relationship between husband and wife. How long is the warranty period? The scope of protection includes the compensation and liquidated damages that should be repaid to the National Scholarship Fund Committee due to the breach of contract by overseas students, of which the maximum compensation is all the expenses funded by the National Scholarship Fund.