While it’s great to have a free form plugin to accepting file uploads from your client, you may still look for alternatives that can:
In such scenario we recommend using Gravity Forms, the most popular WordPress premium form plugin, to help you gathering assets from your clients.
Please refer to these two documentations from Gravity Forms and how they meet the requirements:
We’ll publish a more detailed tutorial on using Gravity Forms with Client Portal as soon as we can. 🙂
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