Forged endorsement schemes and altered payee schemes both involve the theft of outgoing checks that are intended for third parties for some legitimate purpose (e.g., a check payable to a vendor for services rendered). In this respect, these schemes differ from other forms of check tampering, in which the check is usually drafted by the perpetrator for a fraudulent purpose. Discuss how this distinction affects the way in which forged endorsement and altered payee schemes must be concealed.