Unsigned comments
If someone forgot to sign a message they posted on a talk page, you can do it for them by using the {{unsigned}} template. Simply place the template at the end of the comments, and include the user's name. For example: {{subst:unsigned|MyNameisForgetful}} would look like this:
— Preceding unsigned comment added by MyNameisForgetful (talk • contribs)
Read more: Wikipedia:Sign your posts on talk pages