Employer forms, posters and publications. Access a variety of forms and publications for employers.The following links will take you to the available online filing, instructions, or paper form. Use Form I9 to verify the identity and employment authorization of individuals hired for employment in the United States. Complete the foreign registration statement (Form RCW 23.95) online using Washington's Corporations and Charities Filing System. You can file online or fill out a paper form and mail it in.