In case you would like to replace articles on already generated, but not sent invoices, you can do it by following this list:

• Create new articles, go to Settings → Invoice Settings → Articles.
• Designate these new articles as substitutes for the currently used article(s) in Settings → Invoice Settings → Articles.
• In the window below, select the invoice rows that you want the system to check and update. Once selected, click the "Process invoices" button. The system will review these invoices and apply article substitution to the relevant invoice row types (Rent, Extra Services, and Other).
• If you want the new articles to be applied starting from a specific date (e.g., January 1st), turn on and define the "Effective from date" below. In this case, if the invoice period falls within January or a later period, the system will automatically replace the existing article with the new substitute article defined in Settings → Invoice Settings → Articles. If the invoice period spans both December and January (or a later period), the system will split the original invoice line into two lines. The line for December will retain the old article, while the line for January will introduce the new substitute article.

Please note that this action is irreversible, so proceed with caution.

After execution, review the invoices to ensure accuracy, as certain edge cases may result in minor discrepancies.

Please note that some edge cases can contain some inaccuracies.