Sibling communication

I've often shared that I communicate with all the teens prior to any school term. I am the king of mail-outs and since last year I now invite my leaders to contact a number of designated kids the week youth group is due to resume.

But there's one tension which must be delicately managed... Sibling communication.

I believe that siblings should get separate communication. Every time.

A household with a pair of kids will get two individually addresses pieces of mail. 
Even though they are contactable on the same home phone number, two different leaders will make contact with a sibling. 

Why?

Because each teen matters. Individually.