> For the complete documentation index, see [llms.txt](https://university.gonexa.fr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://university.gonexa.fr/sign/en/advanced-features/interactions-and-fields/understand-sign-interactions.md).

# Understand Sign interactions

Interactions let the recipient complete information at the time of signing, then synchronize this data into Salesforce.

On a document template, interactions are possible on the following objects:

* The main object of the document template: for example "Opportunity"
* The parent object of the main object: for example the opportunity's account
* The secondary objects configured on the document template

Before configuring your interactions, check the field type compatibility for your signature level:

{% hint style="warning" %}
**Tip**

Note, however, that for certified signatures you can use a text interaction for a Salesforce number or currency field.
{% endhint %}


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