State of Washington, . . . . . . County, ss.
I, . . . . . ., Assessor . . . . . ., do solemnly swear that the assessment rolls and this certificate contain a correct and full list of all the real and personal property subject to taxation in this county for the assessment year (year) . . . ., so far as I have been able to ascertain the same; and that the assessed value set down in the proper column, opposite the several kinds and descriptions of property, is in each case, except as otherwise provided by law, one hundred percent of the true and fair value of such property, to the best of my knowledge and belief, and that the assessment rolls and this certificate are correct, as I verily believe.
Subscribed and sworn to before me this . . . . day of . . . . . ., (year) . . . .
(L. S.) . . . . . ., Auditor of . . . . . . county.
PROVIDED, That the failure of the assessor to complete the certificate shall in nowise invalidate the assessment. After the same has been duly equalized by the county board of equalization, the same shall be delivered to the county assessor.