Before the assignment of the certificate shall be authorized notice shall be mailed to the owner at the address appearing on the tax books of the municipality at least five days prior to the taking of action by the governing body and public notice shall be posted in three public places in the municipality at the time of the mailing of the notice. In municipalities having over five thousand inhabitants the notice shall be published at least once in a public newspaper published or circulated in the municipality within five days prior to taking action.