[#wallet-CAddressBookData-label]
= xref:wallet.adoc[wallet]::xref:wallet/CAddressBookData.adoc[CAddressBookData]::label
:relfileprefix: ../../
:mrdocs:

Address label which is always nullopt for change addresses&period; For sending and receiving addresses, it will be set to an arbitrary label string provided by the user, or to &quot;&quot;, which is the default label&period; The presence or absence of a label is used to distinguish change addresses from non&hyphen;change addresses by wallet transaction listing and fee bumping code&period;

== Synopsis

Declared in `&lt;wallet&sol;wallet&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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std::optional&lt;std::string&gt; label;
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