"duly attended" is correct, and it can be used in written English.
It is usually used to refer to something that someone did as expected, or was done in a timely manner. For example: "The meeting was duly attended by all members of the board."
The troops duly attended in their "fuck-the-war" chanting thousands.
The Runaways rocked the Joan Jett/Cherie Currie backstory's pants off (literally)." Meanwhile, at the festival itself, Jett herself turned up to play a live show with the Blackhearts, which was duly attended by Fanning and Stewart.
The speech was at turns optimistic and businesslike ("Uniformity in the currency, weights, and measures of the United States is an object of great importance, and will, I am persuaded, be duly attended to"), but most of all it was mercifully short: According to CNN, at around 1,000 words, is thought to have been delivered in just ten minutes.
Mr Davis duly survived.To anyone attending the 2002 Republican state convention at Anaheim, with its rows of elderly white zealots, the chance that the party would ever select a pro-choice, hedonistic actor seemed only a little higher than that it would choose Bill Clinton.
Although he was elected president of the American Historical Association, and duly served, Morison almost never attended its meetings.
One of Jane Stevenson's extra somethings, demonstrated when she made her debut with "Several Deceptions: Four Novellas" a few years ago, was that she could write as though she had, in some other life, been born a Dutchman, attended Leiden University and duly weighed World War II quandaries that made the contact points between innocent observation and collective guilt a murky matter indeed.
But even as the audience duly complied, Tyson — during the performance I attended — quietly complicated the moment.
The test results and any clinical features that needed attention of the attending doctors were duly communicated.
In his first few months in power, Kim duly tried to connect with his people, attending a Disney-style show and staging photo opportunities with bemused children.
He duly contacted a local mediation service but was told his ex would not attend, therefore mediation could not proceed.
I duly wrote it up here as an "overnight must-attend" and a welcome addition to the European tech events scene.
