Abillio invoices are only recorded in accounting when the recipient of the invoice (customer) clicks the "confirm" button when viewing the invoice sent by e-mail - until then, the invoice is treated as a "sample" or "draft".
Here's what it looks like:
You can learn about the Abillio invoice format and approval process here:
(a) adding yourself as a "customer" and sending you a trial invoice via email to yourself;
(b) by generating a trial invoice and sending it to your customer, informing him ahead of time that the trial invoice must be "Declined" (by clicking the red Decline button).