This is the second completed project of The Common Core of European Private Law launched at the University of Trento.

General editor's preface; Contributors; Table of legislation; Abbreviations; 1. Some perennial problems; 2. Contemporary solutions; Case 1: promises of gifts; Case 2: promises of compensation for services rendered without charge; Case 3: promises to pay debts not legally due; Case 4: a promise to come to dinner; Case 5: promises to store goods without charge; Case 6: promises to do a favour; Case 7: promises to loan goods without a charge; Case 8: a requirements contract; Case 9: promises to pay more than was agreed I; Case 10: promises to pay more than was agreed II; Case 11. Promises to do more than was agreed: promises to waive a condition; Case 12: promises to take less than was agreed; Case 13: options given without a charge; Case 14: promises of rewards; Case 15: promises of commissions; 3. Comparison; Index by country; Index by subject.