I had bought an "option" (pre-reservation) for two KLM tickets and wanted to use two vouchers (so-called Travel Discount Certificates, that I had received from KLM last year due to flight problems) when I were to use my option and buy the tickets. These vouchers were each valid 50 EUR until 28 February 2012. I then contacted KLM by phone and talked to one of their employees, but she told me, that I could not use these vouchers to partially pay for the tickets, because their web site wasn't able to receive information... read full review »