The Manitoba government says it may have mailed about 35 tax statements to the wrong businesses.
The finance department says the statements were for retail sales tax accounts that were in arrears, and include the business name, account number and amount of tax owing.
The department says the statements were mistakenly put in envelopes with statements destined for other businesses.
The province has notified all sales tax account holders of the problem as well as the provincial ombudsman.
The department says it apologizes for the error and is investigating what went wrong.