If you have received an invoice, it is unfortunately not possible to change the period covered by the invoice.
Once the invoice has been paid, you can change the next period via our self-service portal.
When you have logged in, click on the drop-down menu to the right of the domain name and select “Change registration period”.
On the next page you can select the desired period.
Please note that the new period only applies from the next time the domain name is invoiced.