What material is the list supplied on?
It can be supplied on Cheshire labels (you need a lettershop to apply those to your mailing piece), pressure sensitive labels (i.e. sticky back/peel-off labels, usually about $9 per thousand extra), or a magnetic tape or diskette (which you need a service bureau to run/output labels for you. Costs $25-$50 flat). If you’re working with a service bureau or doing a merge purge, a magnetic tape or diskettes is usually required. FTP file transfers are available on a case-by-case basis.