Hi —
Thanks for your question and the kind words about Formidable.
Formidable field ids (and keys) are unique across all forms. So there will be only one field 12 on your site, in all of your Formidable forms. We don’t specify form ids in our code examples because they’re not needed. The field id fully identifies the field.
If you have any questions about this, we’re happy to help!
Warmly,
Laura