A $69-$year$-$old woman, who has for many years kept a lot of financial and tax bonds in her pocket, and from time to time changes the locations of those bonds at home for fear of them being lost or stolen, says that this act causes her a lot of stress, and she does not feel safe. But she cannot prevent herself from doing so$.$ She claims that these bonds are very important, and that the owner of the house may evict her if she loses the lease. She constantly insists on requesting official papers and transactions to avoid a tax penalty resulting from late payment.

What are the best psychological treatments that should be provided for this condition and why? Explain the appropriate treatment direction as well?