ADDRESS, verify and standardise your postal addresses

With our mailing validation solution, verify, standardise and control your customer postal addresses data in batch or real time.

SOLUTION

Check local and international postal addresses

The ADDRESS module allows you to simplify what and check domestic and international (EMEA and APAC) postal addresses in real time at all customer contact detail touchpoints. To check postal addresses already stored in a customer database, postal address verification processing can also be done. DQE is committed to the quality of US and international postal addresses, thanks to our 240 qualified and maintained international postal geographical databases.

A unique solution to verify and control your customers’ postal addresses

Powerful algorithms

High error tolerance suggests relevant postal addresses despite typos.

A fast engine

Accesses a database of more than 240 countries and territories in less than a second

International
technology

Adopts the local habits for entering a postal address.

Powerful partnerships

With the most exhaustive postal database suppliers.

Features

Postal address autocomplete

Our intuitive and powerful search engine suggests a relevant postal address from entering just a few characters, despite any typos, or phonetic or inversion mistakes (high error tolerance).

DQE’s international engine is adapted to the specifics of every country and international phonetic rules to offer a seamless customer journey. Assisted input may be GPS (funnel) type or on a line (search bar).

An input check is done after submission to ensure an accurate postal address was entered, and to suggest a correction to the address if necessary.

USE CASE

Why verify and control postal addresses?

The benefits of verified and standardised postal addresses

Making databases reliable

Improved quality of your databases as soon as the postal address is entered.

Facilitating the customer journey

More intuitive input forms via assisted form-fills removing irritants.

Reduction of undeliverable items

Reduced instances of undeliverable parcels or items and the related costs.

Boosted conversion rate

Optimized marketing campaigns thanks to reliable contact information.

Check postal addresses

Postal addresses are at the heart of multiple services

Although digital channels are becoming more and more important in customer relations, the postal service is still a valued channel for many scenarios and industries. For example, in e-commerce orders are sent by mail or home delivery service. It is impossible to get items to the right mailboxes without verified postal addresses. The verification of postal information involves both the real-time entry of addresses by your customer service department or the customers themselves, and the addresses stored in your database, which may change over time. This is why managing the quality of customer addresses and ensuring they are valid and up-to-date is an integral part of your customer data quality efforts.

Beware of unvalidated address information

Between a business address, home address, primary or secondary address, your customers may have multiple addresses. They’ve also possibly moved, changed companies, or actively reside in different locations. Without verification, your mail and deliveries are subject to being undelivered or returned, potentially incurring losses to your business. In addition to your logistical hassle, these mailing hiccups affect customer relationships. Nothing is more frustrating than not receiving their packages. Data quality is crucial to ensuring you the correct values for street name, city, zip code, and more in real time, and that you have reliable information in your contact database or can modify an address in case of change.

The quality of verified addresses better guarantees of delivery to the right address

The strength of your customer relationships and your company's brand reputation relies on your ability to ensure their deliveries arrive at the right place, even internationally. Data quality allows you to capture the exact address in real time with the help of data entry assistance to correct basic info, like adjusting a postal code, according to postal standards and to update them when a customer's contact information needs to be changed. The best data quality solutions are based on international standards approved by the postal services of the respective countries, ensuring smooth international deliveries. Postal address verification is therefore absolutely central to the performance of your business.

FAQ

Postal address verification involves checking the address against an authoritative reference database — typically the official postal directory of the relevant country (e.g., Royal Mail PAF in the UK, USPS in the US, La Poste in France). The process confirms that the street, house number, city, and postal code combination actually exists and can receive mail. Solutions like DQE’s ADDRESS module do this in real time during data entry or in batch on existing databases, covering over 240 countries and territories.
Address standardization is the process of reformatting an address to conform to the official conventions of its country — correct field order, abbreviations, capitalization, and postal code format. For example, “350 fifth ave, new york, ny 10118” becomes “350 FIFTH AVE, NEW YORK, NY 10118-0110” with the full ZIP+4 code appended. Standardized addresses are essential for deduplication (the same address written in different ways won’t be recognized as identical without it), bulk mailing, geocoding, and parcel delivery.
Industry estimates suggest that between 5% and 20% of addresses in a customer database are inaccurate or outdated at any given time, with data decaying at roughly 20–25% per year as people move, companies relocate, and street names change. This rate is higher in databases that lack real-time validation at the point of entry. Regular address cleansing — both preventive (real-time) and curative (batch) — is the standard approach to managing this decay.
The main reasons for failed deliveries are: incorrect or incomplete address data entered by the customer, addresses that have become outdated (the customer has moved), and formatting errors that confuse carrier systems. Prevention starts at the point of data entry, using address autocomplete and validation tools to guide customers toward entering a correct, deliverable address. DQE clients who implemented real-time address validation have reported reducing undelivered items by up to 50%.
Address autocomplete is a real-time suggestion feature that predicts and completes a postal address as the user types, drawing from a reference database of valid addresses. It reduces input errors, speeds up form completion, and improves the user experience — particularly on mobile. High-quality autocomplete engines, like the one in DQE’s ADDRESS module, are built with fuzzy matching and error tolerance, meaning they return relevant suggestions even when the user makes a typo or enters fields in the wrong order.

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