Reporting verbs are a simple but effective way of improving your sentences. Said can usually be replaced with a far more descriptive verb which gives the reader or listener information about how the speaker was feeling at the time the words were spoken. Good examples for the referral letter are: complained, mentioned, stated, demanded, explained etc.
Can you find all 6? [It’s a great way to improve your scanning skills for Reading Part A]
There is no apostrophe in this common way for ending a formal letter but there is an ‘s’ on the end of Yours. The ‘s’ in sincerely is in small case as it is part of the phrase.