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Streamline delivery operations and reduce failed deliveries with validated addresses and precise GPS coordinates.

A customer orders online, waits in, and nothing arrives. The parcel has gone to the wrong flat, or the driver couldn't find the building at all. The customer contacts support, a replacement is sent and the original comes back. Meanwhile, they've left a one-star review.
Failed deliveries are an expensive operational headache. The cost of redelivery, wasted courier time, returned stock and the customer goodwill you don't get back. Most of it can be traced back to the same root cause: an address that was never verified when the order was placed.
Customers mistype their address at checkout, and no-one catches it until the delivery fails
Flat and unit numbers are missing from records because the address lookup didn't include Multiple Residence data
Drivers navigate to the wrong location because coordinates are inaccurate or unavailable
Customers on new build estates can't get deliveries because their addresses can't be found
Returns and redeliveries pile up, quietly eroding margins
Postcoder verifies delivery addresses at the point of checkout, before the order is dispatched.
When a customer types their postcode or the first line of their address, Postcoder returns a validated, structured result that includes rooftop-level latitude and longitude coordinates. That means your couriers navigate to the right front door, not just the right street. Multiple Residence data is included as standard so customers in flats or halls of residence can find their exact address just as easily as anyone in a house.
To reach customers on new build estates, you can include Not Yet Built data from Royal Mail, or even access UPRNs updated daily from the Ordnance Survey National Geographic Database (NGD).
The result is fewer failed deliveries, lower redelivery costs, and customers who receive their orders exactly when they expect to.
Postcoder is a multi-feature API you can integrate into your website or app quickly and easily using pre-built integrations, sample code and API reference, all within clear and well-structured docs. You can be up and running in minutes with a free trial, and Postcoder's support specialists are always on hand if you need help.
Customers find their address quickly at checkout, and validated data enters your system automatically. Structured address fields and accurate postcodes mean fewer exceptions for your fulfilment team to handle manually.
Learn more about address lookupReturn precise latitude and longitude, accurate to rooftop level. Give your couriers the coordinates they need to find the right property first time, every time.
Learn more about rooftop coordinatesPostcoder includes Multiple Residence data as standard, covering the 800,000 addresses in the UK that share a front door – student halls, apartment blocks, converted properties. Customers who previously couldn't find their address now can.
Learn more about multiple residence data
"The rooftop lat/long coordinates have proven to be far more accurate than any other service. We use the service to send couriers a specific lat/long every time, which has hugely increased our successful delivery rates."
Laura Bailey E-commerce Product Manager / Pasta Evangelists
"Having a more simplified checkout page with the help of Postcoder has had two major benefits to our business. Faster checkouts by customers who haven't had to type in their full address, and a major reduction in data errors – where we saw a big drop in incorrect details entered."
Alex Woods Digital Marketing Executive / Victorian Plumbing
"Previously we had issues with addresses being inputted incorrectly. Postcoder has solved this problem, meaning less time wasted sorting it out manually and parcels being delivered wrongly."
H.E. Brand Product Manager / G2 review
Businesses rate Postcoder 4.7 stars out of 5 on the world's most trusted software marketplace.

Join over 10,000 organisations using Postcoder to capture better data and deliver better experiences. Start your free 30-day trial today - no credit card required.