If the whole cost of a ticket is paid for with an Amtrak voucher (grey-blue paper, set of numbers like an airline ticket at the bottom, need to fill in your name and address on the back) do you receive AGR points for the ticket?

If not, would you receive points for a ticket paid partly with such a voucher and partly by credit card/cash/check?

In short, does payment method determine or affect points accrual?