a person who claims to have been contacted by aliens
contactee in American English
(ˌkɑntækˈti)
noun
1.
a person or thing that is contacted
2.
a person who claims to have communicated with or been contacted by visitors arriving from outer space
Word origin
[contact + -ee]-ee is a suffix forming from transitive verbs nouns which denote a person who is theobject or beneficiary of the act specified by the verb (addressee; employee; grantee); more recent formations also mark the performer of an act, with the base being anintransitive verb (escapee; returnee; standee) or, less frequently, a transitive verb (attendee) or another part of speech (absentee; refugee)