The finance director disagreed with the company's change of policy, so she resigned.

RESULTED (4 words)

The finance director's disagreement with the company's change of policy .

The Finance director's resignation resulted from her disagreement with the company's change of policy.

Explanation:

If you are resigning as a director it does not invalidate as a personal guaranty. Once, you have resigned you can not able to access the accounting details of the company.

If a director needs to resign within a terms of his or her contract, or he  takes voluntary decision he should notify companies house online or by post within 14 days of resignation.

The answer for the above statement is

The finance director's resignation resulted from her disagreement with the company's change of policy.