The things which must not be on a resume are your unprofessional mail ID like axghekj3251@****.com instead use a proper mail ID and phone number which you have access to most of the time. Multiple phone numbers may cause trouble sometimes when they try to approach you. Any personal details of caste, religion, political or religious issues should not be mentioned on your resume. Do not use any inappropriate keywords. It’s better not to mention too much information about your previous job because they might raise a question, “Why did you leave your previous job?” You should be able to answer that. Don’t use different types of fonts. Use the same font style throughout the resume.