Money paid on an inoperative contract may be recovered back, sec 742.

Deposit on real estate may be recovered back on failure to make title, sec 743.

Money paid for worthless securities may be recovered back, sec 744.

Money paid cannot be recovered back when contract is prevented from completion by casus, sec 745.

When title of goods is warranted, price can be recovered back; and so when there is breach of warranty going to whole consideration, sec 746.

When failure of consideration is imputable to plaintiff, he cannot recover, sec 747.

On partial failure of consideration, price when entire cannot be recovered back, sec 748.

A party buying on speculation and losing cannot recover back, sec 749.

Compromise money paid voluntarily cannot be recovered back, sec 750.

Money paid from motives of policy or kindness cannot be recovered back, nor debts of honor, sec 751.