Environmental Working Group found that some cash register receipts contained enough BPA to rub off on your hands when you handle the receipts. However, more than half the receipts tested did not contain BPA.
Register receipt paper IS available without BPA, so ask the local stores where you shop if their register paper contains BPA. If it does, ask them to switch to BPA-free paper.
More details: www.ewg.org/bpa-in-store-receipts