Once a Notice of Objection is filed, does that automatically stop an Ontario probate application?

Filing a Notice of Objection stops the specific outcome it targets: the court registrar will not issue a Certificate of Appointment of Estate Trustee based on the will you've objected to while your objection remains on file. It does not, by itself, freeze the estate's assets, remove the person acting informally as executor, or resolve the dispute — it simply blocks that one administrative step until the objection is dealt with, withdrawn, or the court orders otherwise.

What happens next depends on what the estate trustee or another interested party does in response. They can wait, negotiate, or bring a motion asking the court to require the objecting party to either prove their case (commonly by seeking an order for proof of the will in solemn form) or have the objection dismissed. If nobody moves the file forward, an objection can sit unresolved for a long time, which can itself cause problems for beneficiaries waiting on the estate. Because a Notice of Objection is a procedural block rather than a final decision, both sides typically benefit from moving quickly, either to resolve the underlying concern or to bring the matter before the court so the estate can proceed one way or the other.