(a) Bond.--When a caveat has been filed, the register shall not delay the probate of a will or the grant of letters for more than ten days after the filing of the petition for probate or for the grant of letters, or after the filing of the caveat, whichever shall be later, unless within such ten-day period a party in interest shall file with the register his bond in the name of the Commonwealth with sufficient surety in such amount, not less than $500 or more than $5,000, as the register considers necessary, conditioned for the payment of any costs which may be decreed against the caveator.

(b) Failure to give bond.--If no bond is filed within the ten-day period, the caveat shall be considered abandoned, except as the register, for cause shown, shall extend the time.

(c) Costs.--The register, or the court upon appeal, shall determine the amount of costs occasioned by a caveat and direct by whom they shall be paid. If all or part of the costs shall be finally decreed to be paid by the caveator, any party interested in the costs may bring suit on the caveator's bond as provided by law.