The Federal Social Service has complemented the list of forms that are considered invalid. Now it contains information about lost (or stolen) documents as of the end of November last year. Invalid sick leave can be found on the first nine digits of his number.
Do not accept or pay such forms. If you find such documents, inform your FSS office.
Recall, sick leave can be fake. If you doubt the authenticity of the document, it is better to contact the local office before paying.