Day/Month/201X
To whom it may concern
I “Owner’s name” owner of “business name” have the right to use the “name of App-business, etc” Trade Name as and where we need too.
This rite has been given to us by the owner xxx as part of the sale and purchase agreement.
I have authorized to “your business or you name” to use the name “name of App-business, etc” for our App uploaded on Google Play Store (Apple Store).
If you have any questions or concerns about the matter above, please do not hesitate to contact me.
Kind Regards,
Owner’s name and signature
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Owner