Not currently, but we are planning on providing filtering for known sandbox purchases (such as the iTunes/Google Play sandbox receipts) in a future update. One thing I would recommend is having separate development and test Title IDs, so that you can minimize the amount of testing you have to do on your live title.
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Soccer Manager - Handling of soccer players / data
Save and Load player location or other data in UE4 Blueprints?
Possible Interesting use for Characters (Design advice and Limits)
Is it possible to store data (tables), modifiable from the Playfab developer dash?
After trying to delete userdata (for testing) with DeleteAll() function, it doesnt work anymore?