When adding mailing to your order, we need to know who to send the pieces to! You can submit your own customized mailing list as an Excel or CSV file online or customize and purchase a list through Hotcards! If you are submitting a list, please have this laid out in a spreadsheet as a different cell or field for separate contact information (for example: first name, last name, company, address, state, zip) for quick and easy processing.