The stamp has to be accepted where you mail the letter. If you are mailing in Canada, you need a Canadian stamp. If you are in the US mailing to Canada, you can use a US stamp.
Canada
Yes, Canadian border officials typically stamp passports upon entry into Canada.
You use the postage of the country of origin, in this case, you would use Canadian postage.
A Canada two-penny black is an old, Canadian postage stamp.
To obtain a Canadian passport stamp, you must have a valid Canadian passport and enter or exit Canada through a designated port of entry. The stamp serves as a record of your entry or exit from the country.
4 cents
what is the cost of a first class satamp from us to canada
0.57 cents in 2011
32 cents
Canadian stamps are only used in Canada. When mailing a letter, you use the stamps of the country of origin. So only Canadian stamps can be used there.
50,000 canadian euros