Hey Mario,

Sorry for the delayed response due to weekend.

We can't skip the invoice creation for free plan as whenever subscription is created invoice need to attached with them .
Which file I have to change in order to avoid this?
Can you share the changes you did previously , so i'll help you to do that in pp4.

Update us.

I've solved.
I edit /administrator/components/com_payplans/includes/event/events/order.php

row 344: public static function onPayplansInvoiceBeforeSave($prev, $new)
{

// Change the invoice serial here

// questa IF evita che venga emesso progressivo fattura se importo a zero.
if (floatval($new->getRegularAmount()) != floatval(0)){

if (isset($prev) && in_array($prev->getStatus(), array(PP_INVOICE_CONFIRMED, PP_NONE)) && $new->getStatus() == PP_INVOICE_PAID) {
$new->setNewSerial();
}

}

I've to complete test but it seems to works.
In this way if an invoice is at 0 no serial numebr was generated. The invoice appear in backend with N/A instead of serial number.

Now I've only to hide invoice download in user account dashboard if total is 0.

Best regards,
Mario

Hey Mario,

Ok, it sounds good that you managed to fix this.

To remove download button for free invoice, you will find this code on below mentioned path.
root/components/com_payplans/themes/wireframe/dashboard/subscription/default.php
see attached screen shot.

Let me know if you have any query.