Santa receives many letters without a name, an address or both. The first batch of letters have just been delivered to Santa from the special post boxes in Aycliffe and he has attached the six which he cannot reply to.
Normally, the elves would look up the names and addresses but they are just too busy getting presents ready. Santa would like the boys and girls to know that he has received their letters and will try really hard to get the presents they have asked for, but not to be worried if they don’t get a letter sent back to them.