The rule states:
Section 5. If, after such notice, a person whose consent is required does not appear and object to the adoption, the court may act upon the petition without his consent, subject to his right of appeal, or it may appoint a guardian ad litem with power to give or withhold consent.
So, it appears that you may still file an objection and the court may still be able to take it into account at its discretion.
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