Display FREE instead of $0.00 on the pdf receipt

Hi! The screenshot you posted here does not look like it’s coming from our PDF invoices plugin. Is this a custom template or are you perhaps using another plugin?

Thank you for a quick reply.
It is a slightly changed template but we are using your plugin for sure.
https://prnt.sc/vgrjtt
Since it is a real order, I did not want to reveal customer info.
Thanks

I see. You can use the following filter to show FREE instead of 0.00:

add_action( 'wpo_wcpdf_before_html',function(){
	add_filter( 'wc_price', 'wpo_wcpdf_format_free', 9999, 4 );
});
add_action( 'wpo_wcpdf_after_html',function(){
	remove_filter( 'wc_price', 'wpo_wcpdf_format_free', 9999, 4 );
});
function wpo_wcpdf_format_free( $price_html, $formatted_price, $args, $unformatted_price ){
	if ( $unformatted_price == 0.0 ) {
		$price_html = 'FREE';
	}
	return $price_html;
}

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

Thank you for your help. The code works.
Since I have a pro version with credit note addition, is there any way to not use “FREE instead of $0” on a credit note pdf document?
Thank you