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Change of Address API

Stay connected and protect ROI


£800 million is the cost UK businesses lose every year for undelivered mail items. We protect your address lists from churn by updating your outdated customer addresses with their current preferred addresses. 

Solve the bad data problem

Maintaining your customers' addresses up to date will help you:

Facilitate moving home for your customers and prospects

​Retain current customers and maintain long-term member relationships

Reduce operational costs from customer support admin tasks

Reduce marketing costs and enhance the customer experience


Confidently populate your database and know that your deliveries and mail will reach the intended audience.

API Frequently Asked Questions

What are the benefits of partnering with Monadd?

We help your company save time, money and resources by taking care of the admin of updating customer information when they move so you can focus on more important aspects of your business. Additionally, we provide you with the most up to date information of your customers' addresses so you can accurately target customers for new contracts and promotions, boosting your top-line while providing a better customer experience overall.

Is there an eligibility criteria to partner with Monadd?

Monadd welcomes any provider who provides services to individuals in the UK.

What do I need to do?

We provide webhooks where you can define endpoints that we will ping on user action. We have a standardized response format we expect the endpoint you expose to us to return so we know that the action was successful.

We have a number of ways to authenticate ourselves and identify the user on behalf of whom the action is taken. Your endpoint will need to conform to one of those.

Are there special requirements for integration?

We provide a service for individuals to inform their service providers of address changes when they move via our web platform. Hence, we require a specific authentication process to enable transfer and update of customer address info by you.

What if I don't have these requirements?

We will work with you and your tech team to implement a bespoke API.

Why should I partner now?

By becoming a partner now, you will join our early adopter program where you will receive discounted integration fees and other perks such as early access to upcoming feature releases.

Where do I start?

Reach out to and we'll get you started.

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