A son gave his parents an unforgettable Christmas gift this year. Joel Riquelme, a successful app developer, decided to pay off his parents’ mortgage. In a video posted on YouTube Joel handed his parents a plain white envelope. Inside was a payoff statement from Bank of America in addition to a note that read, “Your house is paid off. Merry Xmas. – Joe. Joel also listed three things his parents had accomplished: raising their kids, paying off college loans and paying their mortgage.