English term
Mexico
Native in: Spanish 
Works in: English to Spanish, Japanese to Spanish, Spanish to English, and 6 more.
with written advance notice
Apr 8, 2020 09:58: changed "Kudoz queue" from "In queue" to "Public"
Apr 8, 2020 15:32: Andrea Capuselli changed "Vetting" from "Needs Vetting" to "Vet OK"
Proposed translations
notificando su decisión con antelación y por escrito
In this context, I would use the verb "notificar", which communicates the meaning implied in "notice" in the source text, followed by "con antelación" (to make it abundantly clear that this has to be stated in advance) and "por escrito", in written form.
Kind regards and best of luck with your translation,
Lucía
El Salvador
BA in Translation & BA in Law
Native in: Spanish 
Works in: English to Spanish, Spanish to English, French to Spanish, and 2 more.
mediante aviso escrito con anticipación
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Often, it is best to translate "notificación" as "service".
Referencia: West, T. (2012). Spanish-English Dictionary of Law 2e. Chattanooga: Intermark.
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Ejemplo de uso en Latinoamérica:
4 nov. 2014 - No obstante ello cualquiera de las partes podrá ponerle término, mediante aviso escrito, con anticipación, respetando el plazo de término de ...
https://www.juntamaldonado.gub.uy/index.php/versiones-2014/1...
Mexico
Confianza, certeza, creatividad.
Native in: Spanish (Variant: Mexican)
Works in: English to Spanish, Italian to Spanish, French to Spanish, and 6 more.
previo aviso por escrito
| agree |
Kiara Urrestarazu
: De acuerdo
22 mins
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Gracias Kiara!
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| agree |
Laura Bouchard
2 days 2 hrs
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Gracias Laura!
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Colombia
Traductores Oficiales Cali
Native in: Spanish
Works in: Spanish to English, English to Spanish, German to Spanish, and 2 more.
Spain
30 yrs experience legal-commercial
Native in: English
Works in: English to Spanish, Spanish to English
con/mediante preaviso por escrito
As an example, in Spain employers must give a statutory "preaviso de despido" before dismissing an employee ("advance notice of termination of employment") which, as in your text, is a "written advance notice".
I see that "preaviso" is likewise very much used in Mexico. Doing a google search for "preaviso" and limiting the search exclusively to Mexican websites (site:.mx), gets 45,300 hits.
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