The Campaign Manager has the capability to handle client's Loyalty Numbers, They can be assigned through a segmented list as a parameter or as an personalized broadcast attribute.
By default the expected parameter or attribute is “LN”. However, you can change this value at the Workspace edition page.
If you don't have permission or can't access the Workspace edition page please request the modification through Ticketing tool (OTTO)
Once on the Workspace edition page:
You need to use the same column name on the file that the one you have configured as Loyalty Number on the Workspace edition page. The default value is “LN”
To see the Sent & DRs report with the loyalty numbers on it: