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[Testing in the Sandbox](https://developers.dwolla.com/docs/testing#simulate-identity-verification-statuses) [Drop-in Components](https://developers.dwolla.com/docs/drop-in-components#full-html-page-example) [Building with Drop-in Components](https://developers.dwolla.com/docs/drop-in-components/building-with-drop-ins#step-3-using-a-drop-in)