"E00027:The transaction was unsuccessful" multiple authOnly transactions back to back with same data

[joe_coolish]

I'm getting the following error when I try to do an authOnly transaction in the SandBox:

"E00027:The transaction was unsuccessful."

My workflow is:

1. Test if a card is valid
2. If valid, present "Receipt" page
3. User authorizes from the "Receipt" page
4. Card is tested if valid again
5. Card is charged

I'm finding that step 4. returns that error message.  If I wait a minute or two and retry, the transaction succeeds.

Am I doing something wrong?  I haven't tested this in Production yet.

Thanks!

[RichardH]

Hello @joe_coolish

If you check the full error response text, it should probably indicate that a duplicate transaction was submitted.  You can learn more about duplicate transactions

at https://developer.authorize.net/api/reference/responseCodes.html?code=11

Richard

[joe_coolish]

Thanks for the reply! That information seems to sum up the issue I'm facing. The page mentioned sending the x_duplicate_window field along with the transaction. I'm using the .NET SDK, so I'm assuming there is a DuplicateWindow property on the request objects?