The contactless option will only become active when the transaction amount is under the contactless limit (e.g. £100.00).
Not all cards are enabled for contactless transactions, please ensure that the card presented to terminal is a contactless card, the customer should contact their card issuer if they are unsure.
Ensure that the contactless card is presented to the contactless card read zone until prompted to remove the card. You can check the card read by observing the lighting of the contactless status lights - the card is read when the confirmation tone is heard and all four lights are lit steadily.