Submit the removal request
Open pipl.com/personal-information-removal-request. The form's required fields are Full Name, Email Address, Type (Deletion, Disclosure, or Disclosure + Deletion) and a Message box; Phone Number and Address are optional. In the Message, ask Pipl to delete the records it holds about you and add anything that helps it match them, such as previous names, cities and a profile URL if you have one. The end of the form has two checks, a math problem you answer in a box and a Google reCAPTCHA, and the Submit button is greyed out when the page loads, so complete both before you look for it.
Pipl's own wording on that page is that the company is "happy to accommodate your request to remove your personal information from our services", which is about as unambiguous as these pages get.
Use an email address you can access, since that's how they'll come back to you - but there's no reason it has to be your primary one.
List your aliases and usernames in any free-text field you're given. Pipl's index is built around linking handles, usernames, and email addresses to a real identity. A deletion keyed only to your legal name may leave the linked identifiers behind.
