Section 2-7-704 - Affidavit and other required supporting documentation(a) Every claim which is due, when filed with the clerk shall be supported by the affidavit of the claimant or someone in his behalf, that the account is justly due, that no payments have been made thereon which are not credited and there are no offsets to the same to the knowledge of the affiant. If the claim is not due when filed or is contingent the particulars of the claim shall be stated. The personal representative may also require satisfactory vouchers or proofs to be produced in support of the claim. (b) If the claim is founded on a bond, bill, note or any other instrument, a copy of the instrument shall accompany the claim. The original instrument shall be exhibited to the personal representative, if demanded, unless it is lost or destroyed, in which case the claimant shall accompany his claim by his affidavit containing a copy or particular description of the instrument and stating its loss or destruction. If the claim or any part thereof is secured by a mortgage or other lien which has been recorded in the office of the county clerk of the county in which the land affected by it lies, it is sufficient to describe the mortgage or lien and refer to the date, volume and page of its record.