Contributions to a campaign and personal information can be anonymous in a public-facing manner only.
When you are making your contribution (on any platform), you will have the option to hide your personal information, your contribution amount, or both:
Can I make a past contribution anonymous? #
Absolutely. In your user account Contribution list (see this article for help getting there), click the expand icon next to the contribution in question.
Then, click ‘View/Edit details’ in the new window.
The option to make your contribution and/or name hidden from the public is under the post details. Don’t forget to save!