attach the invoice for certain payment methods

Hi @yergomezz,

Yes, it is! Please add this code snippet to your site to disable the invoice only for specific payment methods:

/**
 * Disable the invoice attachment for specific payment methods
 */
add_filter( 'wpo_wcpdf_document_is_allowed', function ( $allowed, $document ) {
	if ( $order = $document->order && $document->type == 'invoice') {
		// Set the payment method IDs below
		$payment_methods_disallowed = ['bacs'];
		$allowed = ( in_array( $order->get_payment_method(), $payment_methods_disallowed ) ) ? false : true;
	}
	return $allowed;
}, 10, 2 );

You can add as many payment methods as you want in the $payment_methods_disallowed array. See How to get the id for a Payment Method in WooCommerce.

If you haven’t worked with code snippets (actions/filters) or functions.php before, read this guide: How to use filters

Let me know if it worked!