RAMQ form 3573 is a sworn declaration: according to the RAMQ, it is an act by which a person makes one or more declarations before a commissioner for oaths, notably when they cannot present a supporting document.
The form's page, last updated on 23 February 2021 according to the RAMQ, does not detail the situations where it is used: ask the RAMQ what it expects in your file before completing the form.
The oath, in brief
Form RAMQ 3573 contains a declaration under oath (or a solemn affirmation): it must be signed before a person legally authorized to receive it — a Commissioner for Oaths, notary, lawyer, clerk, or justice of the peace.
In Québec, a Commissioner for Oaths can administer this oath remotely, by videoconference, when the required conditions are met (seeing and hearing each other, viewing the document, keeping it confidential).
Where to get the document
Form RAMQ 3573 is published by the Régie de l'assurance maladie du Québec (RAMQ). Its official page gives access to the document and the available versions.
Download form RAMQ 3573 (ramq.gouv.qc.ca, PDF, in French)
Have form RAMQ 3573 sworn online
Form 3573 is signed during the session: have valid photo ID and the information to declare on hand, then sign before the commissioner by videoconference — you receive the signed document right after, ready to send to the RAMQ.
Before booking, confirm with the court registry or the receiving organization the deadlines that apply to your file.