The document discusses various modes of discharge of a contract, including: 1) Discharge by performance or attempted performance when both parties fulfill their contractual obligations. 2) Discharge upon the death of a contracting party if the contract is personal in nature. 3) Discharge if performance becomes impossible or unlawful, such as if the subject matter is destroyed. 4) Discharge by mutual agreement through novation, rescission, alteration, or remission if the parties agree to replace or modify the original contract terms. 5) Discharge by operation of law after a specified time period has lapsed or if one party becomes insolvent.