The card features the recipient's address details on a peelable label that is removed to reveal the return address and pre-printed stamp.

It aims to simplify the procedure and increase responses and TNT Post UK is aiming the product at markets such as utilities where it could be used for meter readings and at companies looking for customer feedback, research or address validation.

Chief executive Nick Wells said: "It's the convenience that will prompt customers to take action and respond to your offer or enquiry. With the ERC there's no log-on, no telephone call, no stamp purchase - it couldn't be simpler."