On Jul 8, 2022, at 8:21 AM, Keith Medcalf <kmedcalf@dessus.com> wrote:
Does anyone have contact information (or address for service of legal
documents) for ICANN?  

https://www.icann.org/locations?

There web site does not appear to contain contact
information.

Sure it does.  If nothing else, at the bottom of that page, it points to the Global Support Center (a link to https://www.icann.org/resources/pages/customer-support-2015-06-22-en)

ICANN apparently promulgates a policy which requires clickage on spam
links in e-mail.  

I’m guessing you’re talking about one or more of https://www.icann.org/resources/pages/contact-verification-2013-05-03-en, probably WDRP.   There is a FAQ on that: https://www.icann.org/resources/pages/faqs-f0-2012-02-25-en. 

I intend to sue them for trillions of dollars for this policy.

Have fun.

Regards,
-drc