How to Write to HM Queen Elizabeth II
To write to HM Queen Elizabeth II, start by writing “May it please Your Majesty” or “Your Majesty” to open your letter. Then, use polite, formal language to state your reason for writing, saying something like, “I wish to inform you of an event that deserves your attention.” Next, provide a detailed explanation of your request, then conclude your letter with a final plea. Finally, close your letter with “I have the honor to remain, Madam, Your Majesty's most humble and obedient servant” if you're a U.K. citizen, or “Yours truly” if you're not a citizen of the U.K.
Outline your ideas. Make an outline of exactly what topics you'd like to say in your letter to better organize. Include an order of what you'd like to accomplish, so you are focused in your approach. For each bullet item, make sub-bullets to further clarify each point. Be sure to divide your thoughts with different forms of bullets, including Roman numerals, lowercase letters, and numbers. Address The Queen properly. Your Majesty or May it please Your Majesty are the preferred terms. While it may be more appropriate to address Her Majesty's Private Secretary or Lady-in-Waiting, you can nonetheless direct the correspondence to The Queen. The Royal family also accepts the less formal Madam substitution. If your correspondence is with an aide, abide by the following rules: The first reference should be Her Majesty The Queen All other instances should be The Queen Third person pronouns should be replaced with Her Majesty Contact The Queen online. While Her Majesty does have an email address, it's not exactly public.  There would no doubt be a flood of emails if it were. If you'd like to shoot a quick message, however, the official Twitter account for the Royal family is https://twitter.com/RoyalFamily (@RoyalFamily). It appears Her Majesty uses it instead of her now defunct individual account. Manage expectations. The Queen receives a large amount of mail, and it's courteous to consider the volume of mail Her Majesty receives.  It would not be inappropriate to ask for an answer or a reply, even if one is not likely.  Do not expect a reply from Her Majesty. If you are lucky enough to receive a reply, it will be signed by the Lady-in-Waiting or The Queen's official writers. Draft the body of your letter. In a polite, formal tone, state your purpose clearly and concisely. It is courteous to briefly inform the reader of the general purpose of your letter, follow with a detailed explanation, then finish with a summary or final plea.  Be wary of what you write, however. The Queen is a constitutional monarch, so letters to her asking for personal or political support of any kind are ill-advised. A proper tone: "I wish to inform you of an important occurrence I believe deserves your attention." An improper tone: "I demand that my local football association get recognition!" Write a practice letter. You may want to write your entire letter and really review how it's structured, analyze its flow, and determine if it conveys the true intention. Once complete, try reading any unclear portion of the practice letter out loud to see if it sounds correct to you. Try sharing your practice letter with a friend or family member. Another set of eyes may find a mistake or provide a better way of presenting your idea. A potential start: I wish to inform you of an important occurrence I believe deserves your attention. An amazing service to our nation has taken place recently, and I believe Your Majesty will bestow recognition upon the very deserving citizen. Ensure the letter is readable. Legibility can go a long way towards recognizing the letters and words, which makes the sounds and meaning easier to comprehend.  Additionally, The Queen is more likely to want to read your letter if the penmanship is neat. Really put an effort into your penmanship so it appears that you put care into the letter. Follow a few common practices below: Don't use an extravagant or difficult to read font. Avoid overly narrow fonts. Black or blue ink is preferable. Lighter colors may be difficult to read. Use standard punctuation, grammar, and capitalization. Steer clear of practices specific to the web (e.g. All caps for yelling, internet acronyms like "lol", and emoticons). Proofread your letter. You need to be positive there are no typos, grammar mistakes, or stylistic issues. Be sure to take time after your initial writing to do the proofreading, because you may miss issues since the original content is fresh in your mind. Read a single line at a time. Try obscuring the following line so your eyes can really focus on potential errors.  You can check for errors by reading your letter from the end to the beginning, one word at a time. If typing rather than handwriting, use spell/grammar check. Sign off properly. Quickly summarize your request (e.g. Thank you for considering the recognition request for such a deserving citizen. ). Then, if you are a citizen of the United Kingdom, you should end the letter with " I have the honour to remain, Madam, Your Majesty's most humble and obedient servant. " You could also replace the word servant with subject. If you are not a citizen of the U.K., choose a respectful closing such as one of the following: Yours Truly works perfectly because it's commonly used when sending a letter to someone of stature. Yours Sincerely is also an accepted closing line. Address the envelope. Write your name and address in the upper left corner. You may receive a reply letter directly from The Queen, or you may receive a letter from Her Majesty's Lady-in-Waiting. The destination address should be as follows:  Her Majesty The Queen Buckingham Palace London SW1A 1AA Mail the letter. Fold the letter into three equal sections. For such an important letter, it may even be worthwhile to measure out the folds before bending the paper. Use the envelope as a guide for the first third measurement. Once the paper is folded, place it in an envelope and send it to The Queen. Acquire proper postage. Depending on your location, and the letter's weight, there may be a somewhat substantial cost to mail the letter to London. If you include something other than the letter, be careful to consider the list of various prohibitions on mail to Great Britain. 
Outline your ideas. Address The Queen properly. Contact The Queen online. Manage expectations. Draft the body of your letter. Write a practice letter. Ensure the letter is readable. Proofread your letter. Sign off properly. Address the envelope. Mail the letter. 