Unable to add tracking number

Hey ​@Wiji77, welcome to the community. 

You're actually on the right track, but the issue comes from the fact that you're referencing specific indexes in the fulfilments array. Since some orders have a gift card and some don't, the tracking number's position in the array is not consistent.

The suggested approach is to loop through the fulfilments and find the first available tracking number. Try this:

liquid

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{% for fulfilment in event.extra.fulfilments %}

{% if fulfilment.tracking_number != blank %}

{{ fulfilment.tracking_number }}

{% break %}

{% endif %}

{% endfor %}

This will go through all fulfilments in the order and display the first tracking number it finds, skipping empty ones (like the gift card). The {% break %} ensures it stops as soon as it finds one.

Let me know if this helps?

Thank you very much for your feedback. It's really nice.
It's all quite new to me and I didn't quite understand (ahah sorry).
I have to put : 

{% for fulfilment in event.extra.fulfilments %}
{% if fulfilment.tracking_number != blank %}
{{ fulfilment.tracking_number }}
{% break %}
{% endif %}
{% endfor %}

In my email template, where do I want to display my tracking number?

Thanks again and sorry if my questions are a bit ‘simple’.