 Also, anyone participating in the telephone call may record the conversation — at least one party in the call must be aware of the recording being made.A recording is always admissible as evidence in a court, even if obtained in illegal matters.There are strict conditions for both the act of surveillance as well as the storage of that data, but as long as it is clear enough of what exactly is being used for as well as implementation procedures were legal by authorities, it is deemed as alright.