How to Say "back side" in Spanish
The Spanish word for “back side” is “verso” — C1 level.
English → SpanishC1
nounC1formal
the reverse side of a page

Examples
Firme en el verso de la página.
Sign on the back side of the page.
La información continúa al verso.
The information continues on the back.
Printing terms
This comes from old book-binding terms. It's rare in casual talk but very common in contracts.
Related Translations
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