canada post logoCanada Post Module

Offer real-time rates to customers, generate bulk order labels in one click, allow customers to track their orders, and more.

Developed by Zack Hussain @

  1. Installation & Configuration
  2. Upgrading From Version 3.x
  3. Notice for PrestaShop to
  4. Rates
  5. Boxes & Box Packing
  6. Rate Discount Rules & Free Shipping
  7. Delivery Time Estimates
  8. Shipping Estimator
  9. Addresses
  10. Labels
  11. Return Labels
  12. Bulk Labels
  13. Manifests
  14. Groups
  15. Tracking
  16. Auto-Update Order Status on Delivered
  17. Setting Up Cron Job
  18. Smart Caching
  19. Troubleshooting
  20. Common Error Messages
  21. Requirements
  22. Changelog

Installation & Configuration

  1. Go to the Modules page.
  2. Search for “Canada Post” and click Install
  3. If you don’t see the module, click Upload a Module and upload the module .zip file.

The module must be configured with your Canada Post account, an origin address, and at least one box.

To configure the module:

  1. Go to Modules page.
  2. Find the Canada Post module and click Configure.
  3. Click Sign in with Canada Post
  4. You’ll be redirected to the Canada Post website where it will prompt you to login to your account and authorize the module to create shipments on your behalf. You can revoke these permissions at any time from the Canada Post website.

If this is your first time creating a Canada Post account and/or adding a new credit card to your Canada Post profile, please allow up to 24 hours for your information to process before using this module. You may encounter errors during that time.

Once you’re connected, it’s recommended to configure all the default label values in the Labels preferences so that you don’t have to set them for every single label you create.

Upgrading From Version 3.x

Notice for users upgrading the module from any version prior to 4.0.0: While care was taken to ensure a smooth update, it is highly recommended to uninstall and reinstall the module as version 4.0.0 is completely re-written from scratch and there’s a possibility of encountering errors.

There are also several dozens of new configuration and customization options in version 4.0.0 that are not in prior versions which should be configured immediately after updating.

Notice for PrestaShop to

PS versions 1.6.x and early versions of PS 1.7 contain bugs that this module must work around.

For versions to, this module automatically installs an Override file at {your_prestashop}/override/classes/Hook.php to solve a particular bug. Before using the module, verify that this file present. If you encounter the error “Invalid id_module or hook_name”, try clearing your cache in Advanced Parameters > Performance and click “Clear Cache” in the top right.

If you still encounter the above error, compare the following two files to see that there isn’t another module attempting to override the same function in the same file: {your_prestashop}/override/classes/Hook.php and {your_prestashop}/modules/canadapostlabels/override/classes/Hook.php. As a last resort, you can manually transfer the module’s Hook.php contents into the Hook.php file in your store’s override/classes folder.

In PS to, you may also need to alter one line of your theme to get the front-office order tracking feature to display properly - add “nofilter” to the following hook:

  1. Open the file {your_theme}/templates/customer/order-detail.tpl


The checkout rates can be configured by selecting the carriers you wish to enable in the Rates preferences. Enabling carriers in the Rates preferences will install them in your back-office automatically (Shipping > Carriers).

The Rates preferences include various settings for Box Packing which are explained in the next section.

If you are not seeing the rates after enabling the carriers, please see the Troubleshooting section.

Boxes / Box Packing

Add all the box dimensions that you ship orders with in the Boxes preferences.

The module uses a sophisticated box packing algorithm to determine the smallest box(es) that will fit all the products in the customer’s cart; it can split the products into multiple boxes when the cart has more products than your largest box can fit.

You can add unlimited boxes into the module from the configuration page. The more boxes you add, the more accurate the rates will be.

You can disable product splitting and only use 1 box for each cart by setting Multiple Box Rates to Off. This will show standard rates for a single box; the module will still use box packing to determine the best box to use.

The Multiple Box Rates setting determines how the module sums up the rates for each box:

Off: Disables multiple boxes and only uses 1 box.

Simple & Fast (recommended): Finds the rate for the LARGEST required box and
MULTIPLIES the rate by the amount of boxes needed. e.g. For 3 boxes:
$10 * 3 boxes = $30 Shipping Fee. This method only calls the Canada
Post API once to get the rates for the cart.

Accurate & Slower: Finds the rate for EVERY box required to fit all
the products in the cart and SUMS all the rates together. e.g. For 3
boxes: $10 + $11 + $12 = $33 Shipping Fee. This method will call the
Canada Post API once for each box that the cart requires. Carts
requiring many boxes may have a longer loading time when retrieving
rates. If your store has a lot of traffic, you may reach your Canada
Post API throttle limit which results in an API timeout for 60
seconds. You can request an increased API limit from Canada Post -
more info on the throttle limit can be found here:

If the cart products require more boxes than the maximum allowed, the module will choose boxes that fit the largest products in the cart until it reaches the maximum.

The Canada Post weight limit per box is 30kg and the module will spread weight across multiple boxes if required.

The limit of boxes per cart is 25.

Possible Issue: If the cart contains a product that does not fit in any of your boxes, the module will be unable to pack the products into your boxes and will revert to using (1) of the largest box you have. The module will display a warning on the configuration page if any of your products are too large for your largest box.

Rate Discount Rules & Free Shipping

You can configure discounts for each Canada Post carrier in the Rate Discount Rules preferences.

Each carrier can have a percentage, dollar amount, or Free Shipping discount applied to it. e.g. Free Shipping when Order Total Is At Least CAD$100.00 tax excl.

You can only create one discount rule per carrier for each Shop.

If you require more flexible ranges, consider using PrestaShop’s built-in carrier system using the following example as a starting point:

In this example we will offer free shipping for only Canada on orders above $100.

  1. Create a new zone called “Canada” (International > Locations > Zones menu).
  2. Edit the country Canada and change its zone from North America to Canada (International > Locations > Countries menu). Zones are only used for Shipping, so update any other carriers with the new Zone if needed.
  3. Create a new carrier called “Free Shipping” (or any other name).
  4. Set its Billing to ‘According to total price’.
  5. Set its Out-of-range behavior to ‘Disable Carrier’.
  6. Set its range to ‘>= 100’ and ‘< 999999’.
  7. Deselect all zones except Canada, and set Canada to 0.00 This will display free shipping for Canada orders when the order total is above $100.00. To disable one or more carriers when free shipping is enabled, do the following for each carrier.
  8. Edit a Canada Post carrier.
  9. Set its Billing to ‘According to total price’.
  10. Set its Out-of-range behavior to ‘Disable Carrier’.
  11. Set its range to ‘>= 0’ and ‘< 100’. This will disable that particular carrier when the order total is above $100.00. Repeat for each carrier you wish to disable.

Delivery Time Estimates

To display delivery time estimates on the checkout page (e.g. 3 Business Days), you must edit one line of code on your theme. Use the following instructions to enable delivery times.

  1. Enable Show Delivery Time Estimates in the Rates preferences.
  2. Open the file at /themes/(your_theme_name)/templates/checkout/_partials/steps/shipping.tpl
  3. Near the top, locate the following line: {block name='step_content'}
  4. Immediately after that line, paste the following code: {if isset($delay_times)}{assign var=delivery_options value=$delay_times}{/if}

Shipping Estimator

The Shipping Estimator allows guests/customers to estimate shipping fees on the Product and Cart pages. To display the Shipping Estimator, enable the Enable Shipping Estimator setting in the Rates preferences.

To estimate rates, guests without addresses can enter a Country & Postal/Zip Code, and customers with addresses will see rates based on their account’s shipping address. Customers with addresses can select which address they wish to estimate shipping rates for.

On the Product page, the shipping estimates are based on the product that the customer is currently viewing along with any products already in their cart, any carrier restrictions for those particular products will apply.

When a guest/customer adds a product to their cart, the Shipping Estimator will then allow the customer to change their cart’s selected shipping method from the Product or Cart pages.


Configure your addresses in the Addresses preferences.

Select one address as your Origin address to be used as the origin for front-office rate calculation.

Your addresses will also be available to be selected for any of the following:

  1. The shipping label “From” address.
  2. The return label “Receiver” address.
  3. The manifest address.


You can create shipping labels on any Order page or in the “Canada Post > Create Label & Return” page in the sidebar.

Creating a label will also create a Shipment in the Canada Post > View Shipments page where you can re-print, void, or track previously created labels.

Shipments created for an Order can also be viewed on the Order’s page.

You can set default values for most of the label fields in the Labels preferences.

You can choose to auto-update Orders to a custom order status and auto-update an Order’s tracking number on label creation in the Labels preferences.

You can view real-time rates for your selected label settings by clicking Update Rate in the label form.

PDF files for created labels can be found in /modules/canadapostlabels/pdf/shipping folder.

Note: Commercial Contract Canada Post customers will need to Transmit their Shipments to create a Manifest in the Canada Post > End of Day / Transmit page. More information can be found in the Manifests section.

Return Labels

You can create a return label for any order that has a Canadian shipping address. Create a return label on an order’s individual Order page and clicking “Create Return Label” or in the Canada Post > Create Label & Return page in the sidebar.

Creating a return label will also create a Return Shipment in the Canada Post > View Return Shipments page where you can re-print or track previously created return labels.

PDF files for created return labels can be found in /modules/canadapostlabels/pdf/returns folder.

Bulk Labels

The Bulk Labels feature allows you to create labels for multiple orders at once with powerful customization options to optimize your workflow.


You can create Bulk Labels in the Canada Post > Create Bulk Order Labels page in the sidebar.

Select multiple orders by clicking the checkboxes next to each order, or by clicking Bulk actions > Select All at the bottom of the page.

Filter your orders by configuring the filters at the top of the Bulk Order Labels table. Your configured filters will be saved and persist every time you visit the page until you reset them.

Create labels for the selected orders by clicking Bulk actions > Create Labels for Selected.

Creating labels for multiple orders will also create a Batch of labels that can be viewed and re-printed in the Canada Post > View Batches page in the sidebar.

If there are any errors for one or more labels during the label creation process, those labels will be excluded from the Batch. You will be able to view the error message by clicking the red error link under the Error column. You can also view all the errors that occurred for a Batch on the Canada Post > View Batches page under the Errors column. Fix the errors for each order and try re-creating the labels.

PDF files for created batches of labels can be found in /modules/canadapostlabels/pdf/batch folder.

Note: Creating large amounts of labels may take several minutes to complete, please allow the page to finish loading and do not refresh/cancel the page load.

Modifying Label Settings

You can modify each individual Order’s label settings by clicking the Edit Label Settings button for the Order or from each Order’s order page.

Any modifications made to an order’s label settings will be stored permanently and will be used instead of the default label values.

Orders with modified label settings will have a Yes under the Modified column and will also be indicated as modified next to Saved Changes in the label form.

Be careful when trying to change an order’s shipping address after modifying an order’s label settings. When you modify an order’s label settings, the shipping address in the label form will be stored independently from the shipping address on the customer’s order. In which case, you will then have to change the shipping address in both the Order and the Label Form Settings.

Live Rates

Real-time rates can be fetched for each order by clicking on the refresh icon under the Live Rate column. These rates are tax incl/excl depending on your tax setting in the Rates preferences.

Label Carriers

The Label Carrier column indicates which Canada Post shipping method the label will use. By default, the module will automatically choose the Label Carrier based on the following in order of priority: (1) the carrier that the customer chose in their Order or (2) the first active carrier for the Order’s shipping country or (3) the first inactive carrier for the Order’s shipping country.

You can override these defaults by using Carrier Mappings in the following section.

Carrier Mappings

You can map your PrestaShop carriers to Canada Post carriers in the Carrier Mappings preferences. Mapping your carriers will pre-select the Label Carrier for you.

Example: If you map “My Custom Carrier” to “Canada Post Expedited” - any orders that chose “My Custom Carrier” as their shipping method will have their Label Carrier defaulted to “Canada Post Expedited”.


You can configure bulk label preferences in the Bulk Order Labels preferences.

You can exclude orders with certain order statuses from showing up in the Bulk Order Labels page by selecting one or more statuses in the Exclude Order Statuses setting. Select/Deselect statuses by holding Cmd/Ctrl+Click.

Example: If you choose to exclude “Shipped” orders, they will disappear from the page after you create labels for them (provided that you have Auto-Update Order Statuses enabled in the Labels preferences).

You can choose to sort your bulk label PDFs by Order ID, Shipping Date, or Order Date (ASC/DESC).

The Delay Between Labels setting is used to slow down the label creation process when more than 60 labels are requested. This adds a delay in between each label to make sure you aren’t hitting the Canada Post API throttle limit and timing out. An API timeout is indicated by the error message “Rejected by SLM Monitor”. You can request an increase in API limits by signing into the Canada Post Developer Program and clicking “Increase Limits”.


A Manifest is proof of payment for a collection of physical shipments. If you are a commercial Canada Post customer you must produce a hard copy of your manifest and provide to Canada Post when they pick up your shipments or when you drop off your shipments at a mail processing plant.

You can Transmit a group of Shipments in the “Canada Post > End of Day / Transmit” page to create a Manifest. Manifests are only used by commercial Canada Post customers with a parcel agreement, regular customers do not need to transmit shipments or present manifests.

You can view all previously created Manifests in the “Canada Post > View Manifests” page in the sidebar.

PDF files for created manifests can be found in /modules/canadapostlabels/pdf/manifests/ folder.

Note from Canada Post: After you print your commercial shipping labels, you must also transmit your shipment information, create a manifest, and provide a hard-copy manifest to Canada Post with your shipment. We monitor all shipments that have not followed this process. Failure to comply will result in manual billing at full rates and/or a loss of your automation discount.


For commercial contract Canada Post customers, Groups are used to organize shipments into groups and transmitting them at separate times. For regular Canada Post customers, Groups can be used as an internal organizational tool.

You can choose which group a shipment will belong to when creating a shipment label. If you don’t need to group shipments, you can simply use the “Default” group for all your shipments.

You can configure your groups in the Groups preferences.


Allow customers to see their order’s tracking progress from their front-office Order Details page by enabling Enable Order Tracking in the Tracking preferences.

This will display a green progress bar in the order details page along with brief information about the last tracking event for their parcel (event description, current location, event time).

The tracking progress will only be displayed if a label was created for the order either via the Bulk Order Labels page or from the individual Order page. It will not be displayed if you created a custom label from the “Create Label & Return” page or if you entered a tracking number manually.

An order may have multiple labels associated with it, in which case the front-office order detail page will have multiple tracking progress bars (one for each label).

For PrestaShop versions to A theme modification may be required to make this feature work due to a bug in the default theme.

  1. Open the file {your_theme}/templates/customer/order-detail.tpl

Auto-Update on Delivered

You can choose to auto-update orders to a custom order status when the Canada Post tracking says it has been delivered. Enable Auto-Update Order Status When Delivered in the Tracking preferences.

The Auto-Update Order Status When Delivered feature requires that you have the free “Cron tasks manager” module made by PrestaShop installed and enabled. Install it by going to the “Module Catalog” page and searching for “Cron” and clicking “Install”. You will then be able to customize the frequency of tracking updates from the “Cron tasks manager” module configuration page.

You can choose multiple order statuses that you want the module to track and auto-update when delivered in the Order Statuses to Track setting. Select/Deselect statuses by holding Cmd/Ctrl+Click. The module will only track orders with those selected statuses and will ignore any orders without those statuses.

Choose which status to update an order with once it has been tracked as delivered in the Delivered Order Status setting.

Setting Up Cron Job

What is Cron

Cron is a Unix system tool that provides time-based job scheduling: you can create many cron jobs on your server which are then run periodically at fixed times, dates, or intervals.

This module uses Cron Jobs for the following two tasks:

  1. Track all shipped orders and auto-update their order status when they are delivered by Canada Post.
  2. Clear cached front-office rates that are older than 3 months.

How to set it up

  1. Install the free “Cron tasks manager” module by PrestaShop by going to the “Module Catalog” page and searching for “Cron” and clicking “Install”.
  2. Go to the “Cron tasks manager” configuration page and change “Cron mode” to “Advanced”.
If you are comfortable setting up a cron job on your own server:
Copy the cron command from the “Cron tasks manager” module and paste it in your server’s cron manager (varies by server). Set the cron job to run hourly (0 * * * *).
If you’re not comfortable setting up a cron job yourself, or you don’t have a developer who can do it for you:
Consider using the service EasyCron (free for 200 cron jobs per day): - and configure the task to run hourly.

Smart Caching

The module stores rates for each cart in the database to speed up your website. It will only retrieve new rates if the customer changes their zip/postal code, the products in their cart, or the quantities for products already in their cart.

In some cases you may be trying to change the module configuration/carriers and refreshing your website to see updated rates. The rates will not update until one of the above conditions have been met, so try changing the products/quantities in your cart to see the new rates.

If you have the free “Cron task manager” module by PrestaShop installed, the module will regularly delete cached front-office rates older than 3 months (cpl_cache & cpl_cache_rate tables) to save space.


Q: Why are the rates not showing up?

Enable Error Logging in the module configuration page to help troubleshoot rates. If there are any errors while retrieving rates, the errors will get logged in the Advanced Parameters > Logs menu. Search for "Canada Post" in the log page to filter your logs.

Common Error Messages

“Rejected by SLM Monitor”
You have exceeded the throttle limit for your API key. You will be blocked from making additional calls for up to a minute. You can request for a limit increase using the “Increase Limits” link found below your API keys on
“The service USA.EP is not available for the specified country or customer/contract.”
You are trying to create a label with a shipping method that is not supported for the destination country. “USA.EP” refers to “Expedited Parcel USA”. Other service codes include “DOM.RP” for “Expedited Parcel” (DOM = domestic/Canada), or “INT.XP” for “International Xpresspost”).
“postal-code value ‘A1A1’ is not a valid instance of type PostalCodeType”
You are trying to create a label or retrieve a rate with an invalid postal code.
" " is not a valid Shipping Point Id on the date of deposit. Use Find a Deposit Location on to find valid site numbers."
You must enter a “Shipping Point ID” in the Labels preferences. Or enable “Pickup” and enter a “Requested Shipping Point” instead.
“requested-shipping-point of type PostalCodeType may not be empty”
You must enter a “Requested Shipping Point” postal code in the Labels preferences. Or disable “Pickup” and enter a “Shipping Point ID” instead.


  1. A Canada Post account.
  2. Your website’s PHP version should be at least 5.4.0