How did you send it ?
Most schools have 2 options:
1) regular mail which is free or quite cheap
2) Registered mail which can cost you up to $20-$30 depending where it is coming from and there is tracking number.
In the case of academic update that is quite time sensitive, you might want to go with the 2nd option and save yourself lots of headache.
Mine went through smoothly and ADDSAS was quick on processing it as well.