Page 2 of 2 CT‑187 (9/11)
Private delivery services
If you choose, you may use a private delivery service, instead of
the U.S. Postal Service, to mail in your form and tax payment.
However, if, at a later date, you need to establish the date you
filed or paid your tax, you cannot use the date recorded by a
private delivery service unless you used a delivery service that
has been designated by the U.S. Secretary of the Treasury or the
Commissioner of Taxation and Finance. (Currently designated
delivery services are listed in Publication 55, Designated Private
Delivery Services. See Need help? for information on obtaining
forms and publications.) If you have used a designated private
delivery service and need to establish the date you filed your form,
contact that private delivery service for instructions on how to
obtain written proof of the date your form was given to the delivery
service for delivery.
Need help? and Privacy notification
See Form CT-1, Supplement to Corporation Tax Instructions.