E-invoice (FE) is the valid tax receipt in Paraguay / issued digitally and validated by SET. It replaces the paper invoice and has the same legal validity. To issue one, you need: electronic invoicing enabled / customer with valid RUC (for invoices with tax credit) / products with VAT configured correctly.

Issue during the sale

The most common way. When confirming a sale:

1. Make sure the customer has a RUC

2. Select Invoice as the receipt type

3. Confirm the sale

4. The system generates and sends the FE to SET automatically

Invoice status

• Processing — Sending to SET

• Approved — SET accepted the invoice ✓

• Rejected — SET found an error ✗

Issue after the sale

If you created a sale without an invoice and need to issue it later:

1. Open the sale details

2. Press Generate invoice

3. Verify the customer's data

4. Confirm the issue

Send invoice to the customer

Once approved, you can send it:

• Email — Automatically sent if the customer has email

• WhatsApp — Press the WhatsApp icon to send the PDF

• Download — Get the PDF for printing or manual sending

Common errors

• Invalid RUC → The customer's RUC doesn't match SET. Correct the customer's RUC.

• Business name doesn't match → The name differs from the SET record. Use search by RUC to obtain official data.

• Tax stamp expired → Your tax stamp has expired. Renew the tax stamp in settings.

• No connection to SET → Network problem with SET. Try again in a few minutes.