Dear parents of _____
I appreciate the company your son/daughter gives however there’s been a lot of absences of him/her. I’m not writing this for (name) to have a punishment but rather for you to push him/her out to attend classes. If not done so I’m afraid there will be consequences the school and that his educational development will affect. Each day he/she is not present he/she misses out on information that we learn which puts him/her very behind. Not only can this affect him/her but also you as the parents. You could even end up with a truancy ticket. I would talk to (name) to see why they haven’t been attending their classes and work it out for the best of everyone.
Hope this helps ! (It’s just a general idea add more info)