Pasted

add_filter( 'woocommerce_simple_auctions_placed_bid_message' , 'custom_woocommerce_simple_auctions_placed_bid_message', 10, 2);
 
function custom_woocommerce_simple_auctions_placed_bid_message ($message,$product_id ){
 
    $product = wc_get_product($product_id);
    $current_user = wp_get_current_user();
 
    if($current_user->ID == $product->get_auction_current_bider()){
        if(!$product->is_reserve_met()){
            if('yes' === $product->get_auction_sealed() )
                $message = sprintf( esc_html__( 'Successfully placed bid for "%s"!', 'wc_simple_auctions' ),$product -> get_title()  );
        } 
    }
 
    return $message;
 
}