Which pages should have "contacts" markup?

Question

Search Engine Optimization

Hello
There is a simple site on WP with a description of services and articles
. You need to make a micro-markup of breadcrumbs, articles, services and contacts.
I can't figure out where these "contact details" should be placed - https://yandex.ru/support/webmaster/supported-sche...
Only on the contact page, on the main page, or anywhere else?

Answer 1

Где имеются контакты, в подвале или на отдельной странице, там и размечать.
Если будет два одинаковых <span itemprop="telephone">[phone]</span>, например, Яндекс все равно найдет их на любой странице, которая индексируется.
Сейчас стало хорошей практикой добавлять контакты на все страницы вниз.

Answer 2

Thank you, somehow I didn’t think that there are contacts in the footer.
But there was another problem with the articles.
The fact is that 2/3 of them have no images at all, and the validator swears, because. there should be at least one.
How is the mind done in such a case? Tell the customer to add pictures or quietly score a crutch in the form of an image with display: none? After all, if there is at least one mistake, micro-markup will not work?