Service Ontario is warning of delays of up to three-and-a-half months for some marriage, birth and death certificates.
The provincial government group says on its website that it is due to longer than normal processing times but does not explain what's causing the delay that ranges from 11 to 14-weeks.
People needing the documents urgently are asked to contact the government by phone.
Some social media users are complaining of delays of up to six-months.