Micro Mailing Canada
Personalized Mail Formatting Rules for Canada Post Compliance
Personalized Mail (formerly Addressed Admail) has to meet Canada Post's format, addressing and return address specifications before it qualifies for processing. Every item in the mailing needs the same size, shape, envelope type and physical characteristics, with only exterior thickness, weight and colour allowed to vary piece to piece. Get one of those details wrong and Canada Post can hold, reroute or reject the mailing, which is why we check formatting before a job ever reaches the press.
Uniform Format Requirements
Every item in a Personalized Mail mailing has to share the same size, shape and envelope type, and it must come from one sender. Only the thickness, weight and colour of the exterior covers are allowed to differ from piece to piece. That single rule is where most formatting problems start: a marketer wants to send a heavier card to top prospects and a lighter postcard to the rest of the list in the same drop, and that split has to be planned as two mailings, not one.
If your campaign mixes formats deliberately, for example a dimensional insert for high-value leads and a standard envelope for the general list, treat them as separate production runs rather than forcing them into one mailing. Our Personalized Mail features and options page outlines the formats Canada Post accepts, and pairing that with data-driven personalization lets you vary the message inside a uniform envelope instead of varying the envelope itself.
Address Labels and Placement
If you're using address labels rather than direct imprinting, the label has to be firmly affixed to the envelope, plastic wrap, insert or card so it stays legible through processing. Labels should be light in colour, white, pale yellow or beige, and we apply a high-quality glue so they don't lift or fall off in transit. Full guidance on label stock and placement is covered on our addressing and labelling page.
Every item also needs a complete, valid address. Canada Post allows addressing to a named individual, a company, or a non-personalized descriptor such as Occupant, but whichever you choose, the piece must carry a valid postal code. Incomplete or outdated addresses are one of the most common reasons a mailing gets flagged, which is why list hygiene and inkjet address correction matter as much as the printed format.
One Sender, One Format
Every piece in a Personalized Mail mailing must share size, shape and envelope type; only exterior thickness, weight and colour can vary.
Light-Coloured, Well-Adhered Labels
Labels should be white, pale yellow or beige and firmly attached so the address survives handling and delivery intact.
One Canadian Return Address for Special Handling
Requesting Return to Sender or Address Correction means dropping down to a single Canadian return address on the piece.
Return Address Rules
The return address on a Personalized Mail piece is allowed to vary across a mailing, provided the physical address or the name of the person or business it returns to stays constant on every item. Canada Post accepts two placements: on the front, in the upper left-hand corner beside the delivery address, or on the back near the top edge, centred between the left and right edges.
If a return address appears at all, it has to be Canadian. Dual return addresses are permitted as long as at least one is Canadian, but that changes the moment you request Return to Sender or Address Correction: those service options require a single Canadian return address, with no second address on the piece. Get this wrong on a campaign built around Personalized Mail and Canada Post can hold or reroute the mailing instead of processing it.
Markings, Indicia and Prohibited Content
Postal indicia, Canada Post logos and trademarks can only appear on a Personalized Mail item under a special agreement with Canada Post, and only in the location Canada Post specifies on the front of the piece. Designs that could be mistaken for postage stamps, franking impressions or service labels are not permitted on the address side, regardless of how the rest of the piece is designed.
Preprinted labels and endorsements are allowed, but only as an instruction related to what's inside the envelope. They can't imply special handling, faster delivery or any other service from Canada Post, and they can't duplicate wording or copyrighted names Canada Post already uses. Our content rules for Personalized Mail cover what can and can't appear on the piece itself, and Canada Post's own references and specifications are worth keeping on file if your team designs mailers in-house.
What makes a mailing work
- Confirm every piece shares the same size, shape and envelope type
- Use light-coloured labels (white, pale yellow or beige) with strong adhesive
- Address each item to a person, company or an approved descriptor like Occupant
- Include a complete address and valid postal code on every piece
- Place the return address in an approved location: front upper-left or back top-centre
- Keep the return address Canadian if requesting Return to Sender or Address Correction
Frequently asked questions
Can envelopes in the same Personalized Mail mailing be different sizes?
No. Every item in a Personalized Mail mailing must share the same size, shape, envelope type and physical characteristics, and all pieces must come from one sender. Only the thickness, weight and colour of the exterior covers can vary. If your campaign needs more than one format, plan it as separate mailings rather than mixing sizes in a single drop.
What colour should address labels be?
Address labels should be light in colour, ideally white, pale yellow or beige, so the address stays easy to read through processing. A high-quality adhesive matters too; labels need to stay attached to the envelope, insert or card for the entire mailing cycle, not just at the print stage.
Does my return address have to stay the same on every piece?
The return address can vary across a mailing, but either the physical address or the name of the business it returns to has to remain constant on every item. Canada Post accepts two placements: front upper-left corner next to the delivery address, or on the back, centred near the top edge.
Can I put two return addresses on one mailing piece?
Yes, as long as one of them is Canadian. That changes if you're requesting Return to Sender or Address Correction: those services require exactly one return address on the piece, and it has to be Canadian. Confirm which service options you need before finalizing artwork so the return address block matches.
Who can a Personalized Mail item be addressed to besides a named person?
Canada Post accepts addressing to a specific individual, a company name, or a non-personalized descriptor like Occupant. Whichever you use, the piece still needs a complete address with a valid postal code. Missing or malformed postal codes are a common cause of processing delays, regardless of how the rest of the address is formatted.
Can I put a logo or stamp-style graphic on the address side of the envelope?
Only Canada Post authorized postal indicia, logos and trademarks can appear on a Personalized Mail item, and only under special agreement with Canada Post, in the location Canada Post specifies. Any design that could be mistaken for a postage stamp, franking impression or service label is not permitted on the address side.
Who checks that our artwork actually meets Canada Post's format rules?
Micro Mailing Canada reviews format, addressing and return address details against Canada Post's specifications before a mailing goes to print, since a rejected piece costs more time than catching the issue upfront. If you're planning a Personalized Mail campaign, request a quote and we'll flag any formatting issues before production starts.
Downloads
- Personalized Mail (Addressed Admail) - Overview (PDF)
- Personalized Mail (Addressed Admail) Machineable Mail Preparation Guide (PDF)
- Personalized Mail (Addressed Admail) - Machineable Mail Design Guide (PDF)
- Personalized Mail (Addressed Admail) - 2017 Pricing (PDF)
- Canada Post 2017 Business Services Pricing (PDF)
Quick quote
Price your campaign
Send the neighbourhood, the quantity and the date you want it in homes. You get a single price covering data, printing, mail preparation and postage.
- Printing and postage quoted together
- Canada Post booking handled for you
- No account or minimum contract
