NRS 147.080: Claims founded on written instrument or secured by mortgage or lien.

1. If a claim is founded upon a bond, bill, note or other instrument, the original instrument need not be filed, but a copy, with all endorsements, must be attached to the statement of the claim and filed therewith.

2. If a claim is secured by a mortgage or lien, a certified copy of the mortgage or lien must be attached to the claim and filed with the clerk.