Diane Luedtke’s Groupon for the Transportation Security Administration’s PreCheck doesn’t work. Can she persuade the company to refund it? Q: I purchased two Groupon vouchers for a TSA PreCheck ...

Q: I bought a voucher through Groupon for a restaurant in Minneapolis. The restaurant closed before I could use the voucher. I asked Groupon for a refund but it refused and instead gave me $65 in ...