Charging Tenant for a repair

[James York]

I have a property under contract to sell and the tenant just contacted me about a sewer pump issue. Turns out it was caused by the tenant and is her financial responsibility per the lease. Expecting that it is unlikely she will pay quickly, how do I handle this? If this isn't handled before closing, would you write it off? Can you still take her to small claims court even if you no longer own the property? Obviously I can't withhold it from security without passing the problem on to the new owner.