We had a situation this week where a customer purchased a couple of items, then brought them back and exchanged sizes/styles which resulted in him paying an additional £32. He then decided they were still not right so we offered a refund however when trying to refund the full amount, the receipt would only allow a refund of up to the £32 extra he had paid. It didn't link back to the original payment. Your support line were helpful and we managed a work around, but it was awkward and I wouldn't be confident if it were a weekend or evening when support were not available, or if it were a day staff didn't have our support as when you have a customer wanting a refund it can be stressful. We rarely have refunds so it's not a regular issue but it is a stressful situation. Could an exchange receipt be linked to an original receipt somehow for this purpose?