If you receive error message ‘We are sorry, but due to the legal restrictions, AliExpress is unable to provide escrow services to residents located in Washington State.', it is because currently due to legal restrictions in Washington State, AliExpress is not allowed to provide Buyer Protection service to residents located in Washington. So if your shipping address is set as Washington State, you will receive this message when you place order. If the buyers use address outside Washington State, it will be OK.
We sincerely hope our Buyer Protection service could be available in Washington in the nearest future.