Create a counter for packages and increment the count after each package is send, the satellite wont do any actions if the count number received is wrong.
The current count will appear in the report status telecommand.
There will be a telecommand to reset the counting.
Each telemetry received from groundstation will also have the current count.
Different groundstation may need to comunicate between to check the current count.
The counting should not be linear because it facilitates to break criptography.
References