Southern Albertans can send a message of condolence to the family of former Premier Jim Prentice, who died along with three others in a plane crash last week.
An official book of condolences has been set up at Calgary’s McDougall Centre.
It's open for members of the public to sign and leave a message.
There is also a condolence page on the Government of Alberta website.
The Transportation Safety Board has said the lack of a voice or data recorder on the plane will make the search for a cause more difficult.
As a result, the investigation into the crash could take up to a year to complete.
Funeral arrangements have not yet been announced.