I would suggest

--------------------------------------------------
Note added at 21 mins (2021-03-02 03:31:43 GMT)
--------------------------------------------------

might need some twiddling but that's the idea

It reads right if the standard wording of 'a las partes' is implied.

BTW, it's to effect and not 'affect' service.

Low confidence level in descending order of 4-3-2 and to highlight my ignorance...

I think this sounds more natural than "let"

--------------------------------------------------
Note added at 2 days 8 hrs (2021-03-04 11:53:58 GMT)
--------------------------------------------------


Criminal Justice Bill, 1983: Committee Stage (Resumed ...
www.oireachtas.ie › dail › John-M-Kelly.S.1969-11-05
21 Jun 1984 — (10) A document required by this section to be served on the accused shall be served personally on the accused and, if he is represented by a ...


Armour Fertilizer Works v. Sanders, 63 F.2d 902 (5th Cir. 1933 ...
law.justia.com › cases › federal › appellate-courts
The defendant is to be served personally if possible, and, if not, by four weeks' published notice, a copy being mailed to his last known address. If he does not ...

M.I. Shahdad v. Mohd. Abdullah Mir | Jammu and Kashmir ...
www.casemine.com › judgement
The scheme of this order is that the defendant is to be served personally if he can be found, failing which summons has to be served on his agent or manager if ...

M69-017.pdf - California Law Revision Commission
www.clrc.ca.gov › pub
PDF
decides at that time whether the defendant is to be served personally or by mail.* The court has no jurisdiction to render judgment unless proof of service is filed ...

'The character is an accused one who should be notified personally through the notification methods indicated by the Fiscal Federal Authority. The parties involved are requested to designate the legal ways or means for future notifications which should be made personally. Failure to do so could result in a listed notification. Similarly, practical policing and the Regional Authority of Security Services from the Federal Judiciary Council respect the necessary protection and an expected waiting time (duly anticipated time period) and the necessary measures recommended on a national level are presented.'

(Tiene que ser notificado y al imputado por vía de los métodos indicados de notificación por la Autoridad Federal y Fiscal. Se ruega que las partes implicadas designen una vía con los medios iguales para notificaciones subsecuentes que se pueden requerir personalmente. Al hacerlo como se recomienda, un resultado puede ser una notificación alistada. Asimismo la policía procesal y la Autoridad Regiojnal de los Servicios de Seguridad del Consejo Judicial y Federal respectan la protección nacesaria durante un período de tiempo anticipado y las medidas.)

--------------------------------------------------
Note added at 2 days 10 hrs (2021-03-04 13:35:56 GMT)
--------------------------------------------------

https://www.thefreedictionary.com/gobbledegook
"Gobbledook is pretentious or unintelligible jargon, such as that used by officials."
One word which is not used normally, but by officials is 'designate' which means 'to specify, to point out, to name, to assign with a character, to select or set aside for a duty, office or purpose.
The notification is sent to an accused person, who is an unusual character, by the nature of being accused (most normal people are not accused and are not usually characters). The type of language used is official. It's an instruction which states that the accused person must be notified.