user4975: Is there a reserved Bitcoin address? 
It should not be able to send bitcoins to it. But the address should be syntactically valid.
Such an address could be used for examples/documentation, without advantaging the author. Similar to example.com.
Wikipedia and bitcoin.it use bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W. Is this a reserved address or is it owned by someone? (resp.: could you send bitcoins to this address?)
If there is no reserved address, which should we use? Simply take a valid address and replace the first digit with, say, a "9"? (would this be future-proof?) Or use a testnet address?

user5009: The address provided is invalid; 

Sorry this is is not a valid bitcoin address

(as per http://blockchain.info/address/175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W)

user24749: The address is invalid because the checksum does not match the provided address. For more information see here: https://bitcoin.org/en/developer-reference#address-conversion

4975: <p>Is there a reserved Bitcoin address? </p>

<p>It should not be able to send bitcoins to it. But the address should be syntactically valid.</p>

<p>Such an address could be used for examples/documentation, without advantaging the author. Similar to <a href="http://en.wikipedia.org/wiki/Example.com" rel="nofollow"><code>example.com</code></a>.</p>

<p><a href="http://en.wikipedia.org/wiki/Bitcoin#Addresses" rel="nofollow">Wikipedia</a> and <a href="https://en.bitcoin.it/wiki/BIP_0021#Examples" rel="nofollow">bitcoin.it</a> use <code>bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W</code>. Is this a reserved address or is it owned by someone? (resp.: could you send bitcoins to this address?)</p>

<p>If there is no reserved address, which should we use? Simply take a valid address and replace the first digit with, say, a "9"? (would this be future-proof?) Or use a testnet address?</p>
 5009: <p>The address provided is invalid; </p>

<blockquote>
  <p>Sorry this is is not a valid bitcoin address</p>
</blockquote>

<p>(as per <a href="http://blockchain.info/address/175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W" rel="nofollow">http://blockchain.info/address/175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W</a>)</p>
 24749: <p>The address is invalid because the checksum does not match the provided address. For more information see here: <a href="https://bitcoin.org/en/developer-reference#address-conversion" rel="nofollow">https://bitcoin.org/en/developer-reference#address-conversion</a></p>
