"if customer.tags contains" does not search for a tag

[PaulNewton]

Some additional steps to try

First replace backquotes ‘ with simple quotes "

{% if customer.tags contains ‘vip’ %}

{% if customer.tags contains "vip" %}

then try downcasing all the tags so matching is more consistent

{% assign customersTagsDowncased = customer.tags | downcase %}
{% if customersTagsDowncased contains "vip" %}
 
{% endif %}

If that does not work, loop over all tags for the check, wrap the following around thelogic

{% for tag in customer.tags %}
 {% if tag == "tagname" %}

 {% endif %}
{% endfor %}