Most business letters must include a return address (letterhead or your name and address), date, an inside address (receiver's name and address), a salutation, body paragraphs, and a closing.
Writing & Reviewing a Credit Application: What You Need to Know Customer's Name. Customer's Address and Telephone Number. Customer's Employer Identification Number (EIN) ... Customer's Bank Information and Credit References. Guarantor's Name, Address, Telephone, Social Security Number, Etc. Signature Line.