Is it permitted for a parent to turn down a potential match for their child without the child knowing?

Question

In Yoreh Deah 240:25 says the following,

אִם הָאָב רוֹצֶה לְשָׁרֵת אֶת הַבֵּן, מֻתָּר לְקַבֵּל מִמֶּנּוּ אֶלָּא אִם כֵּן הָאָב בֶּן תּוֹרָה. תַּלְמִיד שֶׁרוֹצֶה לָלֶכֶת לְמָקוֹם אַחֵר, שֶׁהוּא בּוֹטֵחַ שֶׁיִּרְאֶה סִימַן בְּרָכָה בְּתַלְמוּדוֹ לִפְנֵי הָרַב שֶׁשָּׁם, וְאָבִיו מוֹחֶה בּוֹ לְפִי שֶׁדּוֹאֵג שֶׁבְּאוֹתָהּ הָעִיר הָעוֹבְדֵי כּוֹכָבִים מַעֲלִילִים, אֵינוֹ צָרִיךְ לִשְׁמֹעַ לְאָבִיו בָּזֶה. ‏

If a father wishes to serve his son, it is permitted (for the son) to receive (the service) from him, except (in a case) when the father is a Ben-Torah. A student who wishes to go to another place (to learn Torah), so much so that he is certain that he sees it will be a sign of blessing in him learning in front of a Rabbi who is there, and his father protests him doing so because he is concerned that in that city there are non-Jews who are lawless, he (the son) does not need to listen to his father regarding this

The Rama comments on this halacha the following:

. הַגָּה: וְכֵן אִם הָאָב מוֹחֶה בַּבֵּן לִשָּׂא אֵיזוֹ אִשָּׁה שֶׁיַּחְפֹּץ בָּהּ, הַבֵּן אֵין צָרִיךְ לִשְׁמֹעַ אֶל הָאָב (מהרי''ק שֹׁרֶשׁ קס''ו‏)‏

And similarly, if a father protests against a son not to marry a certain woman that the son desires, he does not need to listen to the father (Maharik, Shoresh 166)

My Question

Based on the above information given, there is a practice among many involved in Shidduchim that the parents do research on their children's potential matches.

That being said, is it permitted for parents to turn down potential matches presented for their children without the children actually knowing about the idea in the first place? If yes, why? If not, is such a practice thus improper?

Update

After some conversation with DanF in the comments it is to be noted that the Rama is stating such a halacha when the woman is already decided upon by the son.

The question that I have (as stated above) is different in that the son has is unaware of such an offer which was rejected by his father. Is the such a concept a "loophole" within the confines of the law? If so, is it within the spirit of the law?

(Please provide sources for answers)

Thanks!

Answer 1

Once a Parent forgos not "working for a child" and agrees to serve as a go beteeen for shidduchim they have the responsibility of any agent, to fulfil the service for the subject, the child, in good confidence. Once an agent has accepted an agency they have a responsibility to fulfil it, similar to taking an oath. Since a child's choice in mate is independeny of Parents' objection, appointing a Parent as an agent does not therefore automatically create some caveat or condition to the agency (shadchaning), as a Parent has no authority in the matter.

Furthermore: When a parent communicates with a prospect or their agent as though they are one who has accepted agency they thereby take on the responsibility to follow through, not to mention failure to do so constitutes interference with the performance of the Mitzvoh to marry, on one end or another.

To conclude: a Parent may refrain/refuse from being involved before the fact and reject calls or information on the subject altogether, but once they agree to accept/receive information written or verbal they thereby take on agency and must follow through without interference and deliver the information unless the child agreed to their interfering/filtering. And the Parent responding after hearing/receiving information with a refusal as if they have been given the authority to do so by the child is ethically corrupt.