What to do about duplicates in your email lists or CRM system

I recently moved house.  Hopefully for the last time ever.  And it made me realise something.  I hate getting all my old mail.  I've been all 'geeky' and done 'remove from database' labels to stick onto unwanted post , but it's a real pain having to write, fax or email all the people that offer me services with my new details.  I will soon get around to it.  

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And you can bet the contacts on your own database feel exactly the same about you.

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One fabulous mailing error so far has come from my building society, the one in which I've just taken out my new mortgage with. How on earth does a different department in that very same society not know I've moved , and continues to write to me at my old address?  I wonder how many 'databases of contacts' that lot have?  Surely a recipe for disaster.  , Which brings me onto our own databases.  Get your data clean, and keep it clean.  And while you are at it, you might as well ask one more question of your contacts - what are they interested in!  , Worth every penny that extra question.  , You'll not only end up with clean information on the contacts keen to keep in touch with you, but what services they are interested in.  Then hey presto, that informs your eMarketing / mailshot activities, and a few good work leads follow.  I can't say enough times how important good data is.  Far more so than a good database.  But you may well have guessed that's what I think already.