There is a wide latitude in the style you use to write the notice. You can pretend you are writing to your sweet old grandmother, or to the Devil himself. From the court's point of view the style doesn't matter if the legal points are made. Choice of style is a strategy decision--what effect do you want to have on the offender? Before sending the notice remember to apply Mark Twain's seven rules for good writing: "Revise, revise, revise, revise, revise, revise, revise." It takes seven major revisions to do a notice correctly.
In your notice to your adversary make the following points:
"Actual notice has been defined as notice expressly and actually given, and brought home to the party directly. Jordan v. Pollock, 14 Ga. 145; McCray v. Clar, 82 Pa. 457; Morey v. Milliken, 86 Me. 464, 30 A. 102. The term 'actual notice,' however, is generally given a wider meaning as embracing two classes, express and implied; the former includes all knowledge of a degree above that which depends upon collateral inference, or which imposes upon the party the further duty of inquiry; the latter imputes knowledge to the party because he is shown to be conscious of having the means of knowledge. In this sense actual notice is such notice as is positively proved to have been given to a party directly and personally, or such as he is presumed to have received personally because the evidence within his knowledge was sufficient to put him upon inquiry. Picklesimer v. Smith, 164 Ga. 600, 139 S.E. 72, 74; White v. Fisher, 77 Ind. 65, 40 Am.Rep. 287." Black's Law Dictionary, 4th Ed., p. 1210.
"Constructive notice is information or knowledge of a fact imputed by law to a person (although he may not actually have it), because he could have discovered the fact by proper diligence, and his situation was such as to cast upon him the duty of inquiring into it. Baltimore v. Whittington, 78 Md. 231, 27 A. 984; Acer v. Westcott, 46 N.Y. 384, 7 Am. Rep. 355." Black's Law Dictionary, 4th Ed., p. 1210.
"'Constructive notice' is a presumption of law, making it impossible for one to deny the matter concerning which notice is given, while 'implied notice' is a presumption of fact, relating to what one can learn by reasonable inquiry, and arises from actual notice of circumstances, and not from constructive notice. Charles v. Roxana Petroleum Corporation, C.C.A.Okl., 282 F. 983, 988. Or, as otherwise defined, implied notice may be said to exist where the fact in question lies open to the knowledge of the party, so that the exercise of reasonable observation and watchfulness would not fail to apprise him of it, although no one has told him of it in so many words. See City of Philadelphia v. Smith, Pa., 16 A. 493." Black's Law Dictionary, 4th Ed., p. 1211.