Personalised Emails Are Critical For Startup Campaigns

Re: "Spending a little bit of time to make sure your data is clean can pay off big in the long run."

Clean data is better, sure! But who spends just a little time cleaning their data? For data of any significant size, that's pretty optimistic, if not laughable.

Sure, for a new startup with maybe a few hundred sign-ups, this sounds possible.

To be fair, the above quote is in the context of customer names. Any suggestions for validating customer names? In the abstract? Matching against real names? In the US? Worldwide?