Before you can submit form designs to LiveCycle Forms ES, some additional work needs to be completed:
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The developer of the custom application must define the requirements of the application. The file format of your form design (XDP or PDF) depends on these requirements.
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Transformation options must be defined in the LiveCycle Forms ES API to support the required transformations. The developer of the custom application will set the options based on input from you.
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If you will be using a signature object in a PDF form design, the developer of the custom application has to integrate a third-party solution to support digital signatures.
See also 

Additional requirements for submitting form designs to LiveCycle Forms ES