To make these actions happen, you need an application to sit in the middle of the call, act as a back-to-back user agent, and provide access to the services mentioned.

要实现这些操作，需要有一个应用程序在呼叫的中间位置充当背靠背的用户代理，并提供对上述服务的访问。

youdao

Ms Smith advised that if this does happen to you, you should call your bank, explain the situation and hopefully they will deal with you sympathetically.

BBC: NEWS | Programmes | Moneybox | Post-dated cheques: A popular myth?