We are so pleased that you are going to be a part of the ACM-SIAM Symposium on Discrete Algorithms (SODA08).Please be advised SIAM has not yet received your conference registration. Although you may register on-site, SIAM requests you register in advance to confirm presentation of your paper.
I had to search my e-mail, to confirm my memory that I had in fact registered. I sent a note back to the sender explaining I had an e-mail confirmation, and got back this response.
Dear Michael Mitzenmacher,
Please note that this is a mass mailing. It clearly states and the end of the registration reminder
“If you have already registered please disregard this message”.
Indeed it does. But why then send a mass mailing saying clearly at the beginning of the message that they haven't gotten a registration, instead of just sending a reminder that speakers need to register? What makes this SIAM conference person (whose name I'm politely removing) think this is OK? It's not to me. I've sent a complaint, and I plan to complain further to SIAM staff at the conference.