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Electronic Debit Note
The Electronic Debit Note (e-DN) is the complementary document that increases the value of a previously issued invoice. Its issuance form is equivalent to that of the Electronic Credit Note: it starts by loading the data of the reference invoice and reuses the same sections described in Electronic Invoice.
Open the Issuance Form
To start issuing an electronic debit note, click Invoicing in the ioFacturo menu and select Electronic Debit Note.

Load Electronic Invoice Data
The form starts with this section, which lets you take the data from an already issued invoice as the basis for the document:

- Select the Electronic Invoice Issued by ioFacturo to which the value increase will be applied.
- Click Load Existing Electronic Invoice so the system brings the original document's data into the form.
Shared Sections
Once the reference invoice is loaded, the form shows the same sections already known: Document Data, Issuer Data, Receiver Data, Product Details, Custom Fields, and Totals Data. See Electronic Invoice for the detail of each field.

The additional section, specific to debit notes, is Reference Data:
- Associated Document Type: type of the document to which the increase applies.
- CDC: control code number of the original document.
- Issuance Reason: select the reason the debit note is being issued (for example, a price adjustment or late-payment interest).
When you finish filling out the form, click Preview.
Preview and Submission
Within the preview you will find the document's information and the KuDE that will be generated, with the CDC to verify the voucher's validity.

- To keep editing the document's information, click Close.
- To continue the issuance process and keep issuing debit notes, click Send to SET and keep invoicing.
- To send the document and finish, click Send to SET.
The interface buttons keep the acronym SET (Undersecretariat of State for Taxation), the former name of the current DNIT. Submission is done through the SIFEN system (e-Kuatia), where the voucher's validity can also be checked with its CDC number.