Inactive users and removing points mod

[peterpiper]

hi all

i'm considering using vbcredits, and, would like to know; is there a mod where if a user hasn't logged in for a month, they lose all their points.

but, however, if they do come back and want their points back, they can pm an admin, and the points will be returned at the discretion of the admin.

i've had a look, but can't find such a mod, so, any ideas how this could be done?