Type annotation here Symptoms You want to activate your copy of Acronis True Image. You provide a 16-digit activation key, like 12345678-ABCDEFGH The key is not accepted, and you get this error:Sorry, we couldn't check this serial number. Try again later.Data in the request are incorrect. Cause A 16-digit key needs to be converted into a full 64-digit serial number. Solution Follow instructions in this article: Activating a Boxed Version of Acronis Product.