APPLE INSIDER
Netflix might soon take an uncompromising position on password sharing, as the company this week began to test a verification system designed to dissuade the common practice.

A select number of subscribers this week were met with a prompt reading, “If you don’t live with the owner of this account, you need your own account to keep watching,” reports The Streamable. Users were then asked to verify their account by entering a generated code sent via email or text.
Source: APPLE INSIDER