Has she agreed to let all 8 of you out of the lease effective 5/31? Get her agreement in writing!
If yes, then May is your 'last month' and she must apply the prepaid money to May's rent. Let her give you the 3-day notice, followed by the unlawful detainer summons & complaint. (She has to serve each of you, BTW.) File an answer within 5 days, stating that you don't owe any rent because you prepaid the last month's rent and May is your last month, and demanding a hearing. Even if you lose the hearing, it will delay things until the end of the month. The complaint & summons will tell you how to do this.
Call the local tenant's unions for help. Tenants Union: 723-0500; Neighborhood Legal Clinics 340-2593. (These numbers are from 1996.)
If she hasn't agreed to let you break the lease, then May is not your last month and you have to pay her. However, you then get the last month's rent refunded when you do move out & she rerents the place. She has to credit you for any June rent she receives from the new tenants. File an answer anyway, as it will delay the eviction until the end of the month.
You can read the statutes on unlawful detainer in RCW 59.12 & 59.18. They're boring, but not too difficult to understand. Don't forget to check the Seattle ordinances - they give you extra protections. MAKE SURE SHE HAS FOLLOWED EVERY NOTICE & SERVICE REQUIREMENT TO THE LETTER. If she gets just one thing wrong, the judge has to dismiss her case and she has to start over.
Good luck,
Tracey
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This is not legal advice and you are not my client. Double check everything with your own attorney and your state's laws.
[This message has been edited by Tracey (edited May 11, 2000).]