This article explains how to block a contact on Skype and Skype for Business. Instructions apply to Skype on Windows, Mac, Android, iOS, Linux, and the web.
How to Block Someone on Skype (2021)
Skype has unified its desktop interface across all platforms, including the web. This unification makes the process of blocking someone much easier. Here’s how to do it:
Right-click or tap and hold on the contact you want to block in the Chats or Contacts tab, then select View Profile.
Scroll to the bottom of the profile window and select Block Contact.