The phrase "proper spelling" means using the correct arrangement of letters to form words correctly and according to accepted standards. Full definition
Use the full proper spelling of words and phrases to boost the chances your resume will be read and accepted by the computer scan. (business2community.com)
Then again, with your busy schedule and set budget, ask yourself now - How long would it take me to write 90,000 words with proper spelling, grammar and form? (toughnickel.com)
So, please use proper spelling, capitalization and punctuation. (form.jotform.com)