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+\section{AML process}
+
+\begin{figure}[h!]
+  \begin{sequencediagram}
+    \newinst{wallet}{\shortstack{Customer \\
+      \\ \begin{tikzpicture}
+        \node [fill=gray!20,draw=black,thick,align=center] { Unique \\ Action};
+      \end{tikzpicture}
+    }}
+    \newinst[2]{exchange}{\shortstack{Taler (exchange) \\
+       \\ \begin{tikzpicture}[shape aspect=.5]
+        \tikzset{every node/.style={cylinder,shape border rotate=90, draw,fill=gray!25}}
+        \node at (1.5,0) {\shortstack{{{\tiny Database}}}};
+       \end{tikzpicture}
+    }}
+    \newinst[2]{staff}{\shortstack{AML staff \\
+      \\ \begin{tikzpicture}
+        \node [fill=gray!20,draw=black,thick,align=center] { Access \\ Token};
+      \end{tikzpicture}
+    }}
+    \postlevel
+    \mess[0]{wallet}{{Initial action}}{exchange}
+    \begin{callself}{exchange}{Establish AML requirement}{}
+    \end{callself}
+    \begin{callself}{exchange}{Queue AML task}{}
+    \end{callself}
+    \mess[0]{exchange}{Wait for AML}{wallet}
+    \mess[0]{staff}{Request AML work}{exchange}
+    \mess[0]{exchange}{{Open AML task(s)}}{staff}
+    \mess[0]{staff}{Request details}{exchange}
+    \mess[0]{exchange}{KYC/AML data}{staff}
+    \begin{callself}{staff}{Review and decide}{}
+    \end{callself}
+    \mess[0]{staff}{{Decision documentation}}{exchange}
+    \mess[0]{exchange}{AML decision}{wallet}
+    \mess[0]{wallet}{{Retry action}}{exchange}
+\end{sequencediagram}
+  \caption{Deposit interactions between customer, Taler exchange (payment
+    service provider) and the AML staff.  The process can be
+    triggered by various {\em actions} described in Chapter~\ref{chap:triggers}.
+    AML staff interactions are cryptographically secured and
+    decisions and the provided reasoning are archived by the exchange.
+    AML staff may interact with the customer (out-of-band)
+    in its decision process.
+    }
+  \label{fig:proc:aml}
+\end{figure}