If you have lost your digital card, you can continue to drive for a maximum of 15 days from the date it was lost.
You must apply for a replacement as soon as possible and in any event, within 7 days.
Whilst awaiting your replacement card, you must take a printout at the start and end of each duty period. You should write your name and driving licence number on the back of the print. These must be retained in your records for 28 days so they can be produced if stopped at the roadside.
It is vital that these printouts are handed into management and matched up to the vehicle mileage report as the VU tachograph will show unaccounted distance which would require explanation.