Chocolate Truffles will keep for up to 2 weeks when kept at room temperature before they go bad.
But if you want to keep the chocolate truffles longer than 2 weeks then you can and should refrigerate the chocolate truffles instead.
When you refrigerate the chocolate truffles instead of keeping them at room temperature you'll extend the chocolate truffles shelf life.
When chocolate truffles are kept refrigerated they will last up to 6 months before going bad.
However I've always eaten my chocolate truffles way before 6 months and usually the chocolate truffles I make get eaten up within a month or even in a few weeks so they usually do not have enough time to go bad.