No, but we strongly recommend you to do it as it will greatly facilitate our communication. In case any clarifications on your assignment are needed, we will find it easier to reach you having your valid email or phone number.
If you are worried about your privacy, you should know we keep all personal information of our customers maximally private and confidential. We avoid any privacy issues by following the rule that does not allow our writers to get personal information of our customers, including their names, e-mails, or phone number. At the same time, customers cannot get writers` personal data as well.