First, she should promptly notify about this fact the voivode that issued this card. This should be up to 3 days from the date of loss. Then the application is made for the replacement of residence card. She need to fill an application, submit two recent photos 4,5 cm × 3,5 cm, proof of identity and citizenship (1 photocopy + original available for inspection). It is also often required to provide a proof of notification to the Police about the loss of this document.
After proper application she'll receive a certificate (free of charge) that confirms this fact.
The voivode shall issue a decision immediately after the investigation procedure within 30 days from the date of filing.