Can I moderate signatures?

Suppose you want to minimise fake names and fake email addresses.

The best way to do it is with email confirmation and use a webhook.

First enable email confirmations, that at least makes sure that a legitimate email address is used, though do keep in mind that email addresses are disposable.

If you are also concerned about real email addresses and fake names, you could use the speakout_signature_confirmed webhook to extend – see how to send an email in the example with the speakout_after_petition_sent webhook. 

Then you can manually delete any you want to on the signature list page.