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The "Validation" return URL is the address of the page on your site to which your customers are sent after choosing their delivery method on the delivery method selection page.

This URL directs them, for example, to the basket summary or payment page.

The "Failed" return URL is the address of the page on your site that your customers are returned to if the page call fails (i.e. they were unable to access the delivery method selection page and choose a delivery method).
This can happen, for example, when some of the call parameters are incorrect, in which case an error code is sent to you by the application.
This page should allow your customer to finalise their order via an alternative delivery method.

In order to avoid any risk of losing the order, Colissimo request the shipper to send also in its parameters for calling the "Failure" return URL just in case the information in the back office cannot be accessed.

For more information on the call parameters, please refer to the integration guide of the Delivery method selection page.

The CO2 Calculator enables customers to find out the CO2 emissions of the parcels they entrust to Colissimo each month (based on the number of parcels invoiced), and to print out an annual CO2 Certificate for each of their accounts or sub-accounts. Monthly data are available at the end of month M+1. The Annual Certificate is available at the end of the 1st quarter for the previous year. 

The calculation method used is that described by the Parcel Delivery Environmental Footprint (PDEF). 

This is a standard (EN17837) validated by the European Committee for Standardization (CEN). It proposes methodologies for calculating and declaring the greenhouse gas (GHG) emissions of parcels. It is inspired by the Global Logistics Emissions Council (GLEC), a voluntary partnership of logistics organizations and industry associations led by the Smart Freight Center (SFC). 

The CO2 Parcel calculator takes into account emissions in line with the GLEC (Global Logistics Emissions Council) Framework, which in turn is aligned with the ISO 14083 international standard (calculation of transport GHG emissions). 

These data include GHG emissions from all means of transport (air, road and sea).

In concrete terms,  

• CO2 emissions in TTW (Tank to Wheel) include all Scope 1 and 2 emissions and Scope 3 category 4 (transport subcontracting category). 
• CO2 emissions in WTW (Well to Wheel) include all Scope 1 and 2 emissions, Scope 3 category 4 (Transport subcontracting) and Scope 3 category 3 (upstream energy factors). 

For further information: or To find out more: ?

According to the GHG Protocol (international protocol providing a framework for measuring, accounting for and managing greenhouse gas emissions), GHG emissions are divided into 3 Scopes: 

• Scope 1, corresponding to internal / direct emissions from energy sources emitting during use (heating oil, gas, fuels, etc.).
• Scope 2, corresponding to internal/indirect emissions from upstream energy sources (electricity, heating networks, etc.)
• Scope 3 corresponds to external emissions from activities outside the company (upstream and downstream), broken down into 15 categories: 

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