Lost Passport raveling from the US

My cousin’s fiancé had an unfortunate issue when she was travelling to Canada from the US for a business trip that was to last 2 days and ended up lasting a week. She had to deal with a Lost Passport, she believes she lost her passport while she was carrying her luggage into a hotel and believed she may have dropped one of her bags which contained all her personal belongings including here ID. She initially tried taking care of the situation on her own and can’t afford the time, so she contacted a Notary Public which dealt with the issue for her and she got her back on a flight back to the US the next day. She should have contacted the Notary earlier.