Given the volume of transfers that have been initiated, and since there is no written confirmation that the customer receives, I suggest you do what I did: ask the (very nice) CSR for his name and file number and location. I did so and he gladly told me his first name, file number, and the MP call center he was in. I said that I hoped to never have to use that information to track something gone awry, but better safe than sorry.

(He also said that indeed MP was getting "slammed" today and that so far the largest transfer was 500,000 UA miles. He said "folks must be reading this on the internet somewhere" )