can I change already preauth transaction amount

[sreekanthreddyi]

How can I change the preauth transaction amount, for example I did preauth for $10 and it is successful, later I want to change the amount and ignore previous amount.

Is it possible?

If I preauth same amount in new transaction with same amount same day I am getting E000027 error.

Can you please provide the reasons for E000027 error?

[RaynorC1emen7]

for E000027 code mean it got decline. You will need to see the detail response to get the response reason code and check the code here

http://developer.authorize.net/api/reference/responseCodes.html?code=E00027