Any tacoma landlord here and I have question about eviction

[Charles D.]

I have a house in Tacoma. Washington state will now allow to evict until after Aug 1st. City Tacoma has law that 60 days of written notice for eviction. I called the city and talked to the person there and was told that the written notice has to be in letter form or hands in by person. It cannot be by email. Tacoma law only said written. So my question is "Does email notice consider a written notice in legal term?" I will also mail a letter with certified mail with tracking. In the past I send the tenant a certified letter and the letter was returned to me from the post office. The tenant is not home most of the time when the postman does the delivery. What if the tenant said I did not receive the letter? Any suggestion? Thanks