one of the documented procedures in this installation of the ACS
ec_email_delayed_credit_denied   order_id
What it does:
Use this to send out the "Delayed Credit Denied" email.
Defined in: /web/philip/tcl/ecommerce-email.tcl

Source code:

    set db [ns_db gethandle subquery]

    set selection [ns_db 1row $db "select, u.user_id from ec_orders, users u where ec_orders.user_id=u.user_id and order_id=$order_id"]

    set customer_service_signature [ec_customer_service_signature]
    set system_url "[ec_insecure_url]"

    # have to get rid of ampersands in above variables because they 
    # mess up regsubs
    regsub -all "&" $customer_service_signature {\\&} customer_service_signature
    regsub -all "&" $system_url {\\&} system_url
    # Note: template #3 is defined to be the "Delayed Credit Denied" email
    set selection [ns_db 1row $db "select subject as email_subject, message as email_body, issue_type_list from ec_email_templates where email_template_id=3"]

    # and get rid of ctrl-M's in the body
    regsub -all "\r" $email_body "" email_body

    regsub -all "customer_service_signature_here" $email_body $customer_service_signature email_body
    regsub -all "system_url_here" $email_body $system_url email_body

    ns_db dml $db "begin transaction"

    # create a customer service issue/interaction/action
    set user_identification_and_issue_id [ec_customer_service_simple_issue $db "" "automatic" "email" "[DoubleApos "To: $email\nFrom: [ad_parameter CustomerServiceEmailAddress ecommerce]\nSubject: $email_subject"]" $order_id $issue_type_list $email_body $user_id]

    set user_identification_id [lindex $user_identification_and_issue_id 0]
    set issue_id [lindex $user_identification_and_issue_id 1]

    # add a row to the automatic email log
    ns_db dml $db "insert into ec_automatic_email_log
    (user_identification_id, email_template_id, order_id, date_sent)
    ($user_identification_id, 3, $order_id, sysdate)

    ns_db dml $db "end transaction"

    set email_from [ec_customer_service_email_address $user_identification_id $issue_id]
    ec_sendmail_from_service "$email" "$email_from" "$email_subject" "$email_body"

    ns_db releasehandle $db