A letter of undertaking is created between two parties in different types of circumstances. When a person writes a letter of undertaking, he is assuring a person that an obligation, between the two parties, will be fulfilled. This letter is written after the two parties agree on a particular activity or decision. It is a brief letter and contains the details of the decision or activity between the two parties. A letter of undertaking is also often used when a third party agrees to fulfil an obligation of another party if the party fails to complete it.
Agree on the terms. Prior to writing a letter of undertaking, be sure that all parties involved in the matter agree on the terms. A letter of undertaking is used in many situations including job acceptances and payment plan agreements.
Address the letter. One party writes a letter of undertaking and addresses it to another party. At the top of the letter address it to the person, followed by the company name, if applicable, and the address. After that information, write in the date of the letter.
Begin the letter. Start the letter by writing "Dear" followed by the person's name, inserting a comma after his name.
Explain the reason for the letter. In the opening paragraph, discuss the purpose of the letter by explaining the situation you and the other party are involved in. If this letter is to accept a job offer, state that you are writing the letter to agree to a position that the reader offered to you. Include briefly, the details of the job position such as the job title and the hourly rate. If the letter is to acknowledge that you will pay a debt, write what the debt is and the amount of the debt.
Include any other terms that were discussed. Write down any other specific details that were discussed between you and the reader such as important dates, amounts and obligations of both parties.
Sign the letter. Close the letter by writing "Sincerely" followed by your name.