In some jurisdictions, reading the banns may be part of one type of legal marriage.
From the en.wikipedia.org
Such a formal church announcement of the intent to marry is known as banns.
From the en.wikipedia.org
At the time, marriages were supposed to be announced by banns in advance.
From the en.wikipedia.org
A requirement for banns of marriage was introduced to England and Wales by the Church in 1215.
From the en.wikipedia.org
Banns goes for the more sophistcated dining end of the market and Hendersons is the more rustic option.
From the guardian.co.uk
Traditionally, banns were read from the pulpit and were usually published in the parish weekly bulletin.
From the en.wikipedia.org
Royal proclamations were read there, as were marriage banns.
From the edp24.co.uk
Such early banns exhorted each company to perform well.
From the en.wikipedia.org
We went to see the registrar to put up the banns.
From the telegraph.co.uk
More examples
A public announcement of a proposed marriage
The banns of marriage, commonly known simply as "the banns" (from an Old English word meaning "to summon"), are the public announcement in a Christian parish church that a marriage is going to take place between two specified persons. ...
The announcement of a forthcoming marriage (legally required for a church wedding in England and Wales and read on the three Sundays preceding the marriage)
An announcement or notice of an intended marriage in a parish church. The banns were published on three consecutive Sundays. If no one "forbid the banns" the couple could get married.
The published intention of marriage which are announced on three Sundays before the actual ceremony in the parish.
A public announcement of an upcoming wedding, usually made weekly for three weeks prior to the wedding, requiring anyone who knew of just grounds why the marriage could not take place to report it prior to the date announced.
Inexpensive, public way to get permission to marry. To 'publish the banns' required the parish rector or vicar to announce an impending wedding during the service on three consecutive Sunday mornings. ...
The legal preliminary to marriage in church is for banns to be published. Banns are the public announcement that two people wish to marry, and an invitation to anybody who knows just cause or impediment to the union to declare it. ...