An accurate description of the services gives the client a clear idea of what awaits them and lets the service provider know what is expected of them. 2. Obligations, Duration and Indemnification. The contractor`s obligations, the duration of the contract, the compensation and the provisions for their payment shall be set out in the quotation previously made available to the undertaking by the supplier, which shall be attached as Annex A, which may be amended from time to time in writing or supplemented by subsequent estimates of services to be provided by the supplier and agreed by the undertaking. and which are taken together by reference. To avoid unasynesting situations where your services are interrupted and you don`t seem to find a quick or reasonable respite, you need to understand what`s important in a service contract and why you need it. Communications, claims or other communications requested or desired by a party below must be made in writing and validly sent or made to another party when delivered personally or if deposited in the United States by mail, certified or registered, without postage, delivery requested. Where such notification or invitation is served personally, the notification shall be deemed constructive at the time of the personal notification. .