Filter Congratulations text based off gateway type.

gistfile1.txt

//EE version as of writing is 4.4.6 - in that version the AHEE__thank_you_page_overview_template__top action does NOT
// have the $trasnaction array available to it, so the /wp-content/plugins/event-espresso-core-reg_446/shortcodes/espresso_thank_you/templates/thank-you-page-overview.template.php
//will need to be edited to add that variable in (first line of the file).

//the functions below should be added to a site specific Custom Functions plugin.

function custom_invoice_response($transaction) {
	return "Please send this invoice with payment attached to the address above before the event (preferred) or bring a copy of the invoice and cheque to the event.";
}
function custom_bankdraft_response($transaction) {
	return "This is a bank draft";
}

add_action('AHEE__thank_you_page_overview_template__top', 'modify_congratulations', 10, 1);

function modify_congratulations($transaction) {
	
	if($transaction->selected_gateway() == "Invoice") {
	add_filter('FHEE__thank_you_page_overview_template__order_conf_desc','custom_invoice_response');
	}
	
	//This is commented out so wont show, but is an example of how you can extend this code 
	// to apply to other gateways
	//elseif($transaction->selected_gateway() == "Bank") {
	//add_filter('FHEE__thank_you_page_overview_template__order_conf_desc','custom_bankdraft_response');
	//}
	
	else { 
	//just return the Standard congratulations message
	return; 
	}
}