If you are writing a letter of intent for a business then there a few things you need to keep in mind. You may start your letter by mentioning your name, address, email address and contact number on the top left corner.
Even taken at their word, it doesn't change the fact that they are using documentary procedures that are unusual, and abnormal. Contact any business college, or speak to established traders or people working for large multinational corporations. Talk directly to international bankers on this.