As the service provider, you are responsible for copying the employee’s identification documents. Do not instruct the new hire to bring you copies. If you’re at your office, making copies is easy. In the field, it’s a little more difficult.
We recommend that you use the Dropbox app on your phone to scan the ID documents. The files will sync to your desktop/laptop, where they will be waiting on you to prep for return along with the Form I-9.
For instructions to set this process up, see this article.