In the recent decision of Mei Fields Limited v (1) Saffron Cards and Gifts Limited and (2) Paul James Steele, the Claimant had to argue that an assignment made between it and the designer was valid and effective.  We come across many documents purporting to assign copyright which if tested before a Court, would be likely to be deemed defective.   Section 90 of the Copyright Designs and Patents Act 1988 requires that an assignment of copyright is in writing, and signed by or on behalf of the assignor. If the assignment in the Mei Fields Limited case had been completed effectively, it is likely that the dispute could have been settled much sooner, avoiding the two day trial which had to deal with the issue of copyright ownership, before the issue of infringement could be considered.