On 4 October 2016 Homer calls a company known as Pest Patrol and speaks to Christine, a representative, then explains his problem and receives an offer of £400 for the services of fumigation, which accepts by telephone. At this point, Homer has agreed to a one-sided contract, in which only one party assumes an obligation under the contract. In this case, the party taking on the obligation is Pest Patrol and its obligation is to provide fumigation services in exchange for money. An example of this can be seen in the case of Great Northern Railway Co v Witham, where it was held that the claim was allowed because there was no obligation on the claimants to order materials, however the defendant was obliged to deliver according to his tender . On 5 October 2016, Homer receives contracts from Pest Patrol which state as conditions of the offer the agreement of £400 pounds for the fumigation service. After signing and submitting the contracts to Pest Patrol on October 5, 2016, Homer does not receive a response from the company for numerous days. On October 11, 2016, Homer attempts to revoke his offer with Pest Patrol by sending a letter, criticizing their speed and informing the company to revoke his acceptance. However, Homer had already accepted the offer through postal regulation which states that acceptance takes effect once the mail has been sent