For any person who has a company, it is necessary, to contact to the client through a letter, the calls bills of sale, but We in fact know to write up one? , we know as to arrive at the potential client of good form, with estusiasmo, respect, and coverall that our arguments without exaggerating they are sufficiently convincing of which our proposal is the best one. A made letter or will the future influence in the pick up of client or the sale that we try to do, because a written or elaborated message it will convince the person who is to the other side and that will read the content. In this means that are Internet are many forms to arrive at the people like are the pages Web and there we must put content that is excellent and that draws the put attention, although it is certain will go videos and images, but words good and that lock up an intensity has much importance. The human beings we communicated through words and images and if those words and images are not the adapted ones distort the information that we want there to give of the importance of our language and expression; if the languages are spoken must take the emphasis in the words to emit, the silencios, the flexions in the voice, the fluidity and by all means the tone of our voice if we are uncertain, we cleared one’s throat, tosemos and we put ourselves nervous, our message will be a disaster, nevertheless, in the written language, there is no voice, there is no sound, only written words but that they must take an intentionality and here we must use: score signs, location of the words, use of capital letters when it corresponds, signs of expression, and the content that the message takes. Before it amassed Internet, to arrive at our potential clients, we were worth of the telephone, the TV, the press and the letters by mail, that were delayed days in arriving, although still they are used. At the moment Internet is massive means and is the best form to arrive at from thousand clients worldwide, we can make businesses with Spain, Korea, China, Australia, etc. no longer it has idiomatic barriers, neither of geographic location that prevents it to us, although it is certain, the telephone, the fax, the conferences online are to our reach, a made bill of sale or can take to good term an excellent business. Know you to write up a bill of sale? Know you to complete a business? If its answer is negative or it does not have time to write up a letter, knows the form simplest to do it, writes successful letters and professional in form instantaneous, it closes businesses with the magic of the written expression and causes that its company grows to exaggerated steps, this will allow him to save time and money..