> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/functional-specification/add_reference.md).
# Merchant Reference and Customer Reference
Allows a merchant to optionally add a \_merchant [reference\_](#system-message-1), a \_customer [reference\_](#system-message-2), or both to each transaction. Either reference string can be used as a search criteria when searching the transaction history on the terminal.
| Merchant Reference | Customer Reference | Merchant and Customer Reference |
| -------------------------------- | -------------------------------- | -------------------------------- |
|  |  |  |
## Advanced Search option
{% columns %}
{% column width="33%" %}
{% endcolumn %}
{% column %}
Displays list of transactions which match the searched merchant or customer reference.
\*\*Description\*\*
All transactions that match the merchant or customer reference partially or in full, regardless of case when searching for any reference through the Advanced Search option.
\
\*\*Merchant action\*\*
Enter a merchant or customer reference to search.
{% endcolumn %}
{% endcolumns %}
***
## Order History screen
The order history screen showing a transaction with merchant reference.
{% columns %}
{% column width="33%" %}
{% endcolumn %}
{% column %}
The merchant reference: “\[cofee\@17thstreet]\(mailto:cofee%4017thstreet)”
{% endcolumn %}
{% endcolumns %}
\---
### Configuration Parameters
* `Merchant.EnableReference` - Enables addition of the merchant reference (1: Enabled , 0: Disabled)
* `Merchant.EnableCustomerReference` - Enables the addition of the customer reference (1: Enabled , 0: Disabled)
* `Merchant.ReferencePromptMaxLength` - Maximum allowed length of merchant or customer reference values
---
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