You need be on the alert for
Although some transactions may be fully documented and appear
authentic you need to look at the overall effect of the series or
combination of transactions in order to identify the real purpose
of the scheme. If you do not understand what is going on then you
should ask the taxpayers to explain the transactions. If you are
still not clear about the arrangement then you should consult TG at
an early stage.
In some cases it may be necessary to see correspondence relating to the setting up of the transaction, notes of meetings, faxes, e-mails, earlier drafts, memoranda of understanding and supplementary agreements between those involved.