Attempting to save money by using some combination of spreadsheets and a non-integrated workflow notification mechanism (for example, E-mail) do not provide the requisite discipline.

These accounts are given out on a non-discriminatory basis, based on an automatic e-mailed challenge to send back a message to prove you received a random key.

You might let your calling program know (through a non-interruptive approach) that an E-mail address might be missing.