Signing fields protects them from malicious actors adding or changing transaction data during transmission. To sign fields, include them in a comma-separated string in the

signed_field_names

field in your request.

To prevent data tampering, include all request fields in the

signed_field_names

field with the exception of the

card_number

,

card_cvn

, and

signature

.

These signed fields are required in all Secure Acceptance requests:

access_key

amount

currency

locale

profile_id

reference_number

signed_date_time

signed_field_names

transaction_type

transaction_uuid

For descriptions of these fields, see Request Fields.

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