12 1351 ontario st burlington ontario mailing address

Here is the mailing address you provided:

12 1351 Ontario St, Burlington, Ontario

Here's a breakdown of the address:

• Street number: 12
• Street name: Ontario St
• Street suffix: (no suffix provided, but it's implied to be "Street")
• City: Burlington
• Province: Ontario
• Postal code: (not provided, but it would typically be a 6-character code, such as L7S 1T9)

If you'd like to add the postal code, I can help you with that!