You can invite your Suppliers to join the Network by going to the "Invite to eInvoicing" section on "My Network" page in Link4 and click on the "Invite to PEPPOL" button (clicking on this button will send an invitation to your Supplier via email).
If your Supplier is on the eInvoicing Network, they will be listed under the eInvoicing Ready section.

Need further help? Email us at support@link4.co or use the live chat support at the bottom right-hand corner of our website.