Hello, {Company Name} Manager! In order for your new hire to have everything ready on the day he or she starts, we need you to fill out the information below in the next day or two. As soon as you get this back to us, we can start the process of getting their setup ready. (We'll send you a reminder just in case you forget to finish it.)
We definitely want to make sure that we help all new folks get started right. If we aren't able to get this information back from you after three days, we'll reach out to your manager as well so that he or she can help.
If you have any questions, just email {Company E-mail}. Thanks!