In your reseller account, once you go to the "My Account" page, you will see a "Contacts" button at the top ôf the page. Clicking on this will bring you to the page where you can manage the contacts of your customers:

This interface allows you to manage operations per contact on your Reseller account.

There are two kinds of contact:

The handle has not been created via your reseller account (or it was done a while back, before your account was converted into a reseller account). You can free the domain from your reseller account, but cannot manage the contact itself.

The handle has been created via your reseller account, you have all the rights over the handle.

Freeing a handle from your reseller account allows the handle's owner to recover its password, in order to have direct control over the domain name.

The list of domains associated to this handle can be seen by clicking here.

You may update a handle's information by clicking on this icon. Careful, if the handle is attached to a domain name, you will not be able to change the title holder itself (name, company, type of handle…).

To delete a handle you can simply click on this icon. Note that handles still linked to a domain name cannot be deleted. —