Nick Pickles, from civil liberties group Big Brother Watch, said that when children leave home it is not uncommon for them to use their parent's address for their correspondence and bank account details.

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Miss Justice Elizabeth Dunne was told that he needed time to note lengthy correspondence from Irish Bank Resolution Corporation.

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For others, it has been an absolutely vital way of ensuring private correspondence and, with more recent developments, being able to demand bank statements which allow privacy rather than relying on someone else to read them (perhaps a neighbour) at a time when confidentiality could be crucial.

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