Report purchase from US held at customs, need advice in Ajijic/Chapala/Guadalajara Posted December 27, 2019 I had a problem mailing two Christmas cards last year. They were for grandchildren and the cards made music. I received them back, torn open the mechanism smashed and the letters scotch taped back together. My guess is they thought I was ending something illegal but they could have just opened and looked. So be careful you don't send anything bumpy by letter.