Yes! Please do! When asking for a letter of recommendation, do not rely on a verbal agreement or an email conversation. Have a physical request that you hand directly to the person. I found a letter of recommendation template in high school and I have used it every time since when asking for recommendation letters. Please do not print out the template and fill it in. Rewrite it on a word processing program and have key parts like the due date in bold. Fill in the the accomplishments section and paperclip a resume and any other documents to the back of it.