[Nasram]

There are no hard and fast rules.

Stating the obvious, don't abuse chargebacks - use common sense and good judgement.

They usually don't check where your funds come from unless you have problems with justice

An Influx of chargebacks triggers an unusual pattern of behavior, thereby It will attract attention.

From my experience, nobody ever asked me where my income was coming from. But I would recommend doing it through paypal and then make a transfert just in case