Key Worker Claim Form To be completed by Key worker on delivery of your Parker Knoll furniture. Once you have submitted your form please send originals of your final sales invoice together with a photocopy of key worker identification card, payment receipt and delivery note to Parker Knoll Upholstery Ltd, Castlewood Business Park, Farmwell Lane, Sutton in Ashfield, Nottinghamshire, NG17 1BX to enable us to validate your claim. These will be returned to you with your £100 cheque.