Each year our firm sends an engagement letter. We have always been able to get a discount for bulk mailing, but the clerk at our post office informed me that in order to get the discount pricing for bulk mailing, we have to have barcodes under the address so it can be "automated". After doing more research, this is called Intelligent Mail Barcodes, and now that I know what it is, I see it everywhere. 

I am currently in the process of exporting data into Excel, turning them into labels, then having Excel include the barcodes. This would be significantly easier if Lacerte has the functionality to include the barcode directly under the address on my engagement letter. Then, I can just use a window envelope and all will be good 🙂