I did some work for one of my clients and half the way I realized I had under-quoted him so I decided to give up. I offered to issue a full refund to him but as it has now passed the refund period of 60 days in PayPal, I can't issue the refund the normal way - there's no refund option any more 60 days after the transaction.

So it seems to me the only way to return the money is via Send Money. Or is it?

If it is, my question is, is it safe / advisable for me to do it this way? What if I have sent the money and then he does something to reverse the original payment? Like a dispute or chargeback or something? As far as I know, the original payment is not reversible at this point, or is it?

Any suggestion and help would be appreciated, thanks!