National Grocery Chain

< 1 min read


The client's extensive loyalty program was not reaching many of their customers. Thousands of letters, emails, and telephone calls weren't getting through to their intended recipients. This resulted in disappoint- ed customers, lost revenues and missed opportunities.


The client's customer loyalty database was huge, but it was filled with errors resulting from system migra- tions, business acquisitions, and a lack of proper maintenance over the years. Contact data formatting problems, duplicate records, field omissions and inaccuracies— all prevented the client from running effective loyalty communications programs. Response rates were low, returned mail was high— messages were bouncing, and calls went unanswered. Intelligent, segmented, customer targeting was particularly difficult. Unless these customer data problems were solved, the client's customer loyalty program would continue to suffer.


Cleanlist performed an exhaustive assessment of the client's data. Custom routines were written to parse, format, and consolidate the client's numerous customer databases. Errors and inconsistencies were corrected, duplicates removed, and the structure of the data was optimized. With a new, clean benchmark for their customer data in place, Cleanlist was then able to enhance the data with current, up-to-date addresses, phone numbers, and more.


  • Multiple databases were formatted, cleaned and consolidated
  • Contact information was updated and verified for accuracy
  • Missing contact data was appended with up-to-date information
  • Regular updates and maintenance provided for ongoing database health

Key Results:

  • Improved postal accuracy of client's customer database from 40% to 90%
  • Identified and corrected the nearly 10% of customers who had moved
  • Identified and updated thousands of records for customers who had deceased

All Categories:
  • Data Optimization
  • Geocode
  • NCOA