in the case titled Partridge v Critenden (1968) 2 All ER 425 it was given that an advertisement shoul d be considered as n invitation to treat rather than an offer ( MacIntyre , 2018). In such cases, a consent becomes effective at the moment when offeree drop the consent letter to the mailbox as decided in the case of Adams v Lindsell (1818) 106 ER 250 Application Applying the decision of Partridge v Critenden , the advertisement placed by insurance company was as an invitation