When's the last time you felt compelled to look into your pension plan? Jung von Matt Stockholm went on a hunt for meaningful, snail mail letters in order to encourage Swedes to read their yearly mailing from client Collectum about how to maximize their pension plans. The agency searched for life-changing letters from social media and retirement homes, and selected the best ones to feature in outdoor ads, showing how a single piece of mail could change their lives. The result? 30% more people decided to open the Collectum letters.