Русско-англо-русский юридический словарь

For example, suppose that A promises to give B £100 if B finds A's dog. The obligation in this case is unilateral in that only A undertakes an obligation at the time the promise is made: B does not undertake an obligation to find the dog. (Contract Law in Scotland, 3rd Edition)

A manufacturer or retailer may undertake an obligation to ensure that the customer becomes a party to a separate contract of insurance in respect of the goods sold. (Note on the Identification of Contracts of Insurance, bankofengland.co.uk)