# Get another user’s certificate information

| Do one of the following:

| Ask the user to export their Certificate and email it to you.
| Choose Document > Trusted Identities. Click Request Contact, and follow the prompts to email a request.

| When you receive the email message containing the other user’s information, open the FDF attachment in Reader, and then click Set Contact Trust.
| Select the items you want to trust from this user, and click OK.

The certificate is added to your list of trusted identities, letting you verify that user’s PDF signatures.

Digital Signatures

Building a list of trusted identities in complete Help