contactDetails can be undefined when we have yet to fetch them

And that's OK - so let's update the propTypes to reflect that.

client/my-sites/domains/domain-management/components/icann-verification/icann-verification-card.jsx

@@ -22,13 +22,10 @@ import QueryWhois from 'components/data/query-whois';
 
 class IcannVerificationCard extends React.Component {
 	static propTypes = {
+		contactDetails: React.PropTypes.object,
 		explanationContext: React.PropTypes.string,
 		selectedDomainName: React.PropTypes.string.isRequired,
 		selectedSiteSlug: React.PropTypes.string.isRequired,
-		contactDetails: React.PropTypes.oneOfType( [
-			React.PropTypes.object,
-			React.PropTypes.bool
-		] ).isRequired,
 	};
 
 	state = {

client/state/selectors/get-registrant-whois.js

@@ -16,6 +16,6 @@ import { findRegistrantWhois } from 'lib/domains/whois/utils';
  * @return {Object}              Contact details
  */
 export default function getRegistrantWhois( state, domain ) {
-	const whoisContacts = get( state, [ 'domains', 'management', 'items', domain ], false );
+	const whoisContacts = get( state, [ 'domains', 'management', 'items', domain ], [] );
 	return findRegistrantWhois( whoisContacts );
 }