Restrict HTML input to only allow paste

Question

Is it possible to have a HTML input on a form that only accepts pasted input?

As part of our registration process, the enduser needs to enter a 20 character identifi

Answer 1

Why make them even paste it in? if you are sending the verification token via email then just route them to http://example.com/verify/{{TOKEN}} via email and pickup the rest of the registration process from there.