All documents should be checked with the spelling and grammar tools on your computer. These checks pick up obvious typing mistakes, and some basic punctuation and construction mistakes.
Companies generally employ well-trained typists.
But written English is a specialist area, and the quality of a company's client communications should be in the hands of specialists. Perfect English editors, even those experienced in proof-reading, must pass our specialised editing course tailored for business writing. When using a printing or typesetting company, check whether professional proof-reading is provided, or whether they are expecting you to take responsibility for the English content. No, Perfect English acts as an editor, correcting your writing so that your business's message comes across as professional. You might be proof-reading literature for our new product and then do work for our competition.