It is possible to consult your bill history online.
In the configuration of your Yapla account, click on "Billing", then choose the menu Invoices and history.
You will see information about the next payment and a preview of the current month.
It is also possible to download a bill by clicking on the corresponding bill in the list, then the "Download" button at the bottom of the page.
Click the "Download" button at the bottom of the page to export your invoice.