i was waiting for this kind of reaction to come, but trust me **spam** also suggested us to write it this way. There is always a risk involved in sending a csi and we are in a critical stage as far as the waiting period is concerned. You might not want to irritate a visa officer so that they don't have this idea that your csi was uncalled for. They actually receives numerous CSIs which slows up the process. So it is important to justify your urgency for making the csi. And trust me, mails get lost in every country, even document was lost from one of my dhl sent to usa, and govt. service providers is a bit slack and relaxed in every county. There is always a high possibility to lose your letter if it is sent through snail mail.