The letter must outline your complaint, the harm you suffered, and how you want the problem resolved. This is called a 30 Day Demand Letter.Edit, sign, and share massachusetts sample letter online. No need to install software, just go to DocHub, and sign up instantly and for free. Employment Offer Letter Instructions. In a formal letter, you would spell out the month in letters, and write the day and year in numbers as shown below. When writing a letter using indented form, indent each paragraph. First include your name, address, phone number, and the date. All the following forms are fillable PDF files that require Adobe Acrobat Reader for viewing. File sizes range from 60 KB to 250 KB.