Is empty

Is empty checks that a field has no answer — skipped, blank text, nothing selected, no file uploaded, or unsigned (for signature blocks). This is the correct operator for “they left it blank”. Do not use Not equals or Does not contain for that case.

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When to choose this

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Exact behavior

Treats these as empty:

• null / never answered
• Empty string ""
• Empty array [] (no multi-select choices)

No comparison value is needed — if Studio shows a value field, leave it unset. For signature blocks, Studio may label this Is not signed — same behavior: no signature captured yet.

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Which field types

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Blank / unanswered answers

This operator exists for blank answers — empty matches, filled does not.

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Configure in Studio

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Worked examples

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Hide invoice when no company

When Company is empty → Then Hide blocks Invoice address

Typing a company name hides the rule’s effect (if no other rule applies).

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Skip verification without attachment

When Attachment is empty → Then Jump to page Summary

Uploading a file disables the jump on next recompute.

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Optional follow-up collapsed

When Referral code is empty → Then Hide blocks Referrer details

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Unsigned waiver

When Liability waiver is not signed → Then Hide submit

Pair with explanation block on canvas.

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Test on fill

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Common mistakes

• Using not equals X hoping blank triggers — it will not; use Is empty.
• Using Is empty on toggle/checkbox — use Equals for unchecked state.
• All group combining Is empty and Equals on same field without planning — often use separate rules or Any mode.

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Troubleshooting