Generosity with expectation of reciprocity is not generous.
This type of giving is transactional, not altruistic.
Giving of yourself and expecting something in return, even acknowledgement or thanks, is not unreasonable, however.
It is simply not generous.
Be clear with your motives prior to giving of yourself or your resources.
If you expect something in return, be honest about that, knowing that you are not being generous.
If you are being generous, expect nothing in return and don’t complain when you get it.
Meditations on God 