Acknowledgment letter is an official letter that is designed to acknowledge the receipt of payment, services of an entity or a corporation or a contribution or to cite some examples. These types of letters are written on formal formats with brief and to the point contents. Acknowledgement letter lets you to say thanks to the people for helping you in the important projects. It should be done on frequent basis because it is essential to show appreciation to people who have made considerable contribution in the completion of your project, report, thesis or formal essay. These types of contributions are important for your work as these can increase the quality of your work and let you to explain every difficult concept without any problem. It is a way to recognize their actual contributions in your work.