Help Identify This Canada(?) Hand Stamped Receipt And Control Marking

I recently came across this cover from Estonia to Kingston, Nova Scotia. The hand stamped receipt and control marking is on the reverse side of this envelope. Since the date and color match the mark on the front, I am assuming it was also marked in Kingston, Nova Scotia. My question is "Can anyone shed more light on the T.E.O. Receipt and Control marking?"

"recommandés" should not have a "é" (e accent aigu) on the first "e".
It should be correctly spelled "Envois recommandés".

I assume you are correct that this hand stamp was applied somewhere in Canada as it is in both official languages, English and French.

Also, the O in TEO is probably OFFICE, the B in BET, BUREAU.

Actually, I don't find that the red ink matches (a clear red and a more burgundy red). Could the T.E.O. stamp have been applied in a mail sorting facility as it arrived in Canda?

Letter was sent on October 29 from Estonia.
Letter was received in Canada on November 5.
Letter got stalled.
Letter arrived in Kinsgton, Nova Scotia, on December 10.

This might help. T.E.O.
The Toronto Exchange Office is where international mail arrives for review and clearance by the Canadian Border Service Agency.
Bureau d'Echange de Toronto would be for the B.E.T.
This would explain the five day delay. It was in the hands of the Canadian Border Agency for a day or two. The rest would be for transportation time between Toronto and the small office (Kingston) in Nova Scotia.