3-6 reference letters per applicant. Ask for references as soon as you have a signed contract.Below are a couple example letters and templates to point you and your references in the right direction. Wondering how to write the perfect coop reference letters? We've collected some reference letters from buyers who successfully landed their desired co-ops. We've redacted contact information and any identifying details. One thing I learned when going through the process is to ensure that you ask your references to include their contact information on the letter. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. Attempting to take the exam for someone else. 2. Offering a bribe to any NYC employee. 3.