Before which authority: Courts of Law
According to which procedure (state the applicable rules):
An authentic act is proof of its own contents, however it may still be contested in a Court of Law. The contestation can be made on various grounds, such as that consent of one of the parties was vitiated or that the one of the parties did not have capacity to contract.
Within what timeframe:
No action for the nullity or annulability of a Notarial Act can be brought about after the lapse of ten or five years respectively, from when the act is registered in the Public and/or Land Registry.