How to cleanse a UK marketing list step by step
A step-by-step guide to cleansing a UK marketing list through six ordered checks: deduplication, PAF postal validation, NCOA, TPS/MPS suppression, email verification, and mortality screening.
UK mobile vs landline data quality: which to prefer when
UK mobile numbers travel with the individual across job and home moves, making them the most durable contact data field, with annual decay of 4-8% versus 12-20% for business landlines.
Mortality screening for marketing lists in the UK
Mortality screening matches a UK consumer file against death registration data to suppress deceased records before a campaign runs, preventing distress to bereaved families and satisfying UK GDPR accuracy obligations.
The MPS wash for direct mail: process and frequency
The MPS wash screens a UK consumer postal mailing list against the DMA register, removes opted-out recipients, and should run before every direct mail campaign.
The TPS wash: what it is, who needs it, how often
A TPS wash screens your UK telephone list against the Telephone Preference Service, removes registered numbers, and keeps your outbound calling programme compliant with PECR Regulation 21.
UK postal address validation explained
UK postal address validation matches addresses against Royal Mail's Postcode Address File (PAF), confirming existence, standardising format, and adding the delivery point suffix (DPS) for Mailmark eligibility.
Data deduplication best practices for marketing lists
How to deduplicate UK marketing lists correctly: five best practices covering match rules, survivor selection, GDPR audit trails, dedup sequencing, and re-running after file merges.
B2C data decay rate: what changes, and how fast
UK B2C consumer data decays at 12-18% per year overall, distributed unevenly across fields: postal addresses erode fastest, personal email addresses shift at 5-8%, and financial profile bands change at 10-15%.
B2B data decay rate: how fast contact records go stale
UK B2B contact records decay at an average of 25%-30% per year, but the rate varies sharply by field, from 20% annually for job titles to just 4%-8% for mobile numbers.
Email verification before send: tools, accuracy, and process
A three-layer process covering syntax validation, MX record lookup, and SMTP handshake verification typically removes 5%-12% of B2B email addresses as undeliverable before a send.