Does it really matter if I put Ave or Avenue?

[thestuffofchris · Accepted solution]

No, it doesn't. Ave is an acceptable short-form of Avenue, but both work just fine. Same as Street and St, or Boulevard and Blvd, or Road and Rd.

[mcrlmn]

Addressing letters and parcels mailed within Canada:

https://www.canadapost.ca/web/en/kb/details.page?article=how_to_address_mail_&cattype=kb&cat=sending