Data cleansing services

Check your customer and supporter records before your next campaign.
Migrate with complete confidence.

Data cleaning for customer and supporter databases

Returned mail and repeated contacts can be signs that your database needs attention. These problems waste campaign budget and create extra work for your team.

Our data cleaning services help charities and businesses address outdated or inaccurate contact records.

What our data cleansing service covers

Eliminate errors, reduce risk and gain confidence in every record.

Deceased flagging

We flag deceased individuals to prevent distressing communications and protect your brand’s reputation.

Goneaway identification

We detect people who no longer live at the listed address – saving costs and improving deliverability.

Movers suppression

We flag individuals who’ve moved and provide new address details where available – helping you stay connected.

Deduplication

We remove duplicate records to cut down on unnecessary contacts and ensure a cleaner, more efficient database.

Validation

We verify and correct key contact fields – like name, address and phone – for better accuracy and reliable segmentation.

Wealth profiling

We help you identify high-value supporters or prospects – giving you the insights to target your premium campaigns more effectively.

Compliance screening

We screen your database against suppression lists like MPS and TPS, helping you stay compliant and avoid contacting those who’ve opted out.

When should you cleanse your database?

Before a fundraising appeal or marketing campaign

Check the records you plan to use before committing budget to print, postage or other campaign activity. If previous mailings have generated returns or duplicate letters, address those problems before the next send.

When your team keeps correcting the same records

Repeated manual fixes can suggest a wider issue. Look at how records enter the database and whether information is being updated consistently, alongside cleaning the existing data.

Before moving to a new CRM

Review the data you intend to transfer before migration. Agree which records should move, how duplicates should be handled and which information needs correcting, so avoidable problems do not carry into the new system.

Why work with Migrate Data?

Data cleansing, migration and quality improvement are our specialist areas. We work alongside your team to understand the problems you’re dealing with and how you need to use your data.

You can speak directly with people who understand the work, ask questions as the project develops and discuss how it fits around your existing processes and deadlines.

Don't just take our word for it...

"Before working with Migrate Data, we struggled to fully leverage our data ahead of a planned campaign, making it difficult to allocate resources effectively. Their data cleansing services have significantly improved our data quality, strengthening departmental confidence and enabling us to build a ‘donor pyramid’ using wealth-tags. Since partnering with Migrate Data, we've seen improved accuracy and better decision-making. The team is incredibly easy to work with— flexible, always adaptable, and quick to implement changes. Their responsiveness and efficiency make them a valuable partner, and we would highly recommend their services."

"Trussell used Migrate Data Ltd to migrate all data when implementing a new CRM in 2016 and then on various projects, most recently on regular data cleaning. We have always found them very efficient, reliable and responsive to any questions. They are always our go to for any migration or data cleaning jobs and we would recommend them unreservedly."

"We have been using Migrate Data to clean our supporter data for many years. They have a reliable portfolio of cleaning files and other products that cater for our requirements. We have always found them to be friendly, efficient, and very helpful. More importantly, they can be very adaptable as our timings can often present a challenge. Children With Cancer would not hesitate in recommending Migrate Data wholeheartedly for any data cleaning or data migration services. "

Does your data need a wider review?

Some problems extend beyond contact details. Inconsistent formats or information spread across several systems can make reporting and day-to-day work difficult.

Our data quality services cover standardisation and ongoing quality improvement. If you’re unsure which service you need, tell us what is happening in your database and what you want to use it for.

Frequently asked questions.

Is data cleansing the same as data cleaning?

Yes. The terms generally describe the same activity: identifying and addressing errors, duplication or outdated information in a dataset. The checks included depend on the data and the purpose of the project.

How often should we cleanse our database?

The right frequency depends on how quickly your records change and how often you use them. A database used for frequent campaigns may need more regular attention. Returned mail, duplicate communications and repeated manual corrections are useful signs that a review is due.

Should we clean our data before a CRM migration?

Reviewing data before migration helps you decide what to transfer and what needs attention first. It also gives you time to agree how duplicate or conflicting records should be handled before they enter the new system.

Does data cleansing mean deleting records?

Not necessarily. A record may need correcting, flagging, merging or excluding from a particular activity. The appropriate action depends on the issue and how the information is used.

What information should we provide when making an enquiry?

Start with your database or CRM, the approximate number of records, the problems you’ve noticed and any deadline. Describe what you want to use the data for so the team can discuss the relevant checks.

Discuss your data cleansing requirements

Tell us which database you use, roughly how many records need attention and whether you have a campaign deadline. We’ll help you identify the next step.