I think it's true that data entry errors are a problem, however I notice a big difference between, for example, financial institutions such as banks, brokers, fund managers, pension companies etc. and some state computer systems in this regard.
That's to say that whilst a financial institution might go a bit bananas over verifying ID for money laundering purposes, their computers don't scream error or fraud or whatever if you include a house name they don't have on their system as well as a house number, or omit a house name they have. They don't seem to go into meltdown over titles or combinations of titles and names. There are oddities that we as humans just get used to but aren't obvious to a machine, for example...Ermintrude Brown has the title lady by birth, so she is Lady Ermintrude Brown or Lady Ermintrude. Her friend Mohammed Khan got a knighthood, so he's Sir Mohammed Khan or Sir Mohammed. He marries Ermintrude's friend, Miss Jennifer Jones, and she becomes Lady Khan, or, where her forename is required, Jennifer, Lady Khan but not Lady Jennifer or Lady Jennifer Khan.
But financial companies that will go berserk over whether you're really who you say you are wouldn't have any glitches at all if their computer tells them that the customer who just filled in the form as Sir Mohammed is the customer on their records as Sir Khan, and he'll be tolerant because he understands that the computer just rearranges the info. And if the computer can't tell the difference between Jennifer, Lady Khan and Lady Ermintrude Brown, it won't matter because it'll just rearrange the info and they'll probably get letters addressed to Lady J Khan and Lady E Brown.
And after all these years, I'm 100% sure that's not just a data entry issue, it's about programming a computer not to go into meltdown over such matters, such as whether Lady Khan and Lady Ermintrude do or don't use commas or whatever. And, oh gosh, if somebody decides it's more to the point to refer to Lady Khan as Dame Jennifer Khan, the bank won't close the account, the worst that will happen is that her next cheque book will say something silly like Dame Lady Khan.
In other words, yes, data entry is relevant, but I observe as someone not able to programme computers that it is possible to design systems in a way that is able to cope with information presented in lots of ways without going into meltdown, particularly without getting hung up over abbreviations and punctuation, computers that are capable of coping with Rd and Road or Rd. or whatever being the same thing, particularly if the postcode is the same, given that for the most part in the UK there will only be one address with a particular number in any given postcode area. Thus the street name and neighbourhood and town and county are actually irrelevant and a computer should be able to accept that without going off on one.