A more thorough explanation:

A perfect attestation clause is a statement in a will that confirms that all the necessary legal requirements have been met to make the will valid.

For example, a perfect attestation clause might read:

"We, the undersigned witnesses, do hereby certify that the testator, [name], signed this will in our presence, that we signed this will in the presence of the testator and each other, and that the testator appeared to be of sound mind and under no duress or undue influence at the time of signing."

This clause confirms that the testator signed the will in the presence of witnesses, that the witnesses signed the will in the presence of the testator and each other, and that the testator was of sound mind and not under any undue influence when signing the will. By including this clause, the testator is ensuring that their will is legally valid and can be executed according to their wishes.