Why it matters
The point of sale is where the cardholder, the merchant's staff and the payment system meet. A POS application handles:
- card reading, PIN entry and receipts;
- the merchant's cash register;
- offline rules and batches;
- configuration from the acquirer;
- keys from a key injection facility.
Most field issues — a stuck batch, a missing receipt line, a double charge after a power cut — start here.