It is very difficult if you want to Use Veriff SDK In Your Xamarin Forms Project. Now You Don't Need to worry about anything further. I Have created Veriff Latest Version bindings for both IOS and ANDROID which you can easily use inside your Xamarin Forms Project.
Official Documentation Link about using Veriff Functions:
https://developers.veriff.com/
Please Note: GUIDELINES FOR IOS
For Running Xamarin IOS Project on Your Simulator You Have To Reference "VeriffIOSLibrary.dll" in Your Project.
For Running Xamarin IOS Project on Your Physical Device You Have To Reference "VeriffReleaseLibraryIOS.dll" in Your Project.
How to Add Veriff Libraries in Xamarin Android Project?
Right Click on references by expanding Android project in Xamarin forms. Then Click on Add New Reference and select all dll files provided in folder Veriff Android Bindings.
How to Add Veriff Libraries in Xamarin IOS Project?
Right Click on references by expanding IOS project in Xamarin forms. Then Click on Add New Reference and select all dll files provided in folder Veriff IOS Bindings.
Sample Code Is Provided!