Fraudulent conduct or false statements by an applicant, or by others with the applicant's connivance in any application or examination, is cause for the exclusion of the applicant from any examination or for removal of the applicant's name from the eligible register, or for discharge from the service after appointment; provided, that no person who has completed the probationary period shall be removed from the service after being accepted for such vacancy, without having an opportunity to be heard in the person's own behalf before the commission.