What script type is the best option for setting the checknumber field to null on a customer refund?

AI generated answer (using internal Slack threads):

Based on the provided Slack threads, the best script type for setting the checknumber field to null on a customer refund would be a User Event script. This script type can be used to override or modify the values of fields on a record after it has been submitted. Here is a sample code snippet that was provided in the threads. This code is used to override the transaction number field on a customer refund, but it can be modified to set the checknumber field to null:

javascript
let documentLookup = search.lookupFields({
    type    : search.Type.CUSTOMER_REFUND,
    id      : recordID,
    columns : ['transactionnumber']
});
let values = {};
values.tranid = documentLookup.transactionnumber;
record.submitFields({
    type   : record.Type.CUSTOMER_REFUND,
    id     : recordID,
    values : values
});

In this code, you would replace 'transactionnumber' with 'checknumber' and set

values.tranid

to null. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******