While recordation of a trademark assignment is not mandatory, it is strongly recommended because it puts potential users and acquirers of interests and rights in the trademark on notice of the identity of the new owner. This can prevent, and help resolve, disputes over the validity of the claims of subsequent purchasers and licensees. If the trademark is federally registered, the benefits of federal registration can be lost or severely diminished by failing to record a transfer of ownership with the USPTO . While an unrecorded transfer may be valid and enforceable between the parties, failing to record an assignment within three months can make the assignment void against subsequent purchasers for value who did not have notice of the transfer.