If the book value is unknown, it may be assessed on the basis of market value.
This may be the case, for example, on a transfer from another financial institution if the acquisition value was not provided or was unknown at the time of the transfer. You will need to track this value if you are required to declare a capital gain or loss.
If you wish to adjust the book value in your file, please complete the Book Value Adjustment 27740 form, available in the "Other forms" section of the forms page. E-mail the completed form to firstname.lastname@example.org. Proof of purchase is required for registered accounts.