Elavon ISO Protocol (EISOP)

The Elavon ISO Protocol supports the following authorisation related transactions:

  • Sales
  • Refunds
  • Sale reversals
  • ‘Force posts’ following referral and voice authorisation
  • Dynamic Currency Conversion (DCC) quote rejections (legacy system support only)
  • Pre-authorisation requests
  • Incremental Pre-authorisation
  • Pre-authorisation completion requests
  • Pre-authorisation reversal
  • Incremental Pre-authorisation reversal
  • DCC Inquiry Requests
  • Elavon Tokenisation Requests – available from May 2019

The protocol also supports:

  • Exchange rate downloads (for DCC)
  • Reconciliation request messages
  • Network management messages

The following ISO message types are used:

Transaction Description

Request MTI

Response MTI

Pre-authorisations / Incremental Pre-Authorisations

1100

1110

Sales

1200

1210

Pre-Authorisation Completions

1200

1210

Refunds / Force / DCC Quote Rejections (including repeats)

1220/1

1230

Sale Reversals (including repeats)

1420/1

1430

Exchange Rate Requests

1304

1314

DCC Inquiry Requests

1305

1315

Elavon Tokenisation Requests 1306 1316

Reconciliation / Batch Closure

1500

1510

Network Management

1804

1814

Notes:

  • Repeat message processing is only supported for 1220 and 1420 message types
  • A maximum number of three repeat messages for a corresponding advice (1X20) message will be accepted by the Elavon acquiring host
  • Chip data is not required for Visa Incremental transactions