[Koha] Help - Patrons Deletions- best practice

[SATISH]

Hi,

Currently With Koha 16.5/Package Installation/ Ubuntu 14.04 Desktop /

Since last six months I am using Koha  (production / live)  in the Library.
Now, one batch of students are going to complete their course on coming May
2017.
I have  to stop/ block such students' access for circulation facility.
(anyhow, expiration date exist for the batch)

What are the standard procedures across the libraries following ..

1. Do you delete the patrons when students complete their course ?

2. If retained, what could be the problems? / Or Should not be deleted?

3. If some verification needed in circulation history, will it be available
in future  as well?

4. Or any other best practice with patron management that you follow,
kindly share ?



With Thanks
Satish MV
Librarian
Govt. Engineering College, Hassan
Karnataka