Change of Address How do I let you know that I have changed address? Why do I need to tell when I move? What is a postmark? How do I arrange for my machine to be moved? How do I change the return address (ERA) on my printed mail? MyQuadient Sign up or log back in to your customer portal. Visit MyQuadient Chat to us Chat to our virtual assistant or chat to us through Live Chat. Start chat Contact us Contact Quadient's UK customer support team. Send email