[tannk11001]

Just talk to them. Standard Operating Procedure would be for them to file a 1099, which generally requires a W9 that provides your information.

The person asking for a W9 from you is probably not familiar with how this changes when working with workers outside the US. You can explain that you won't be able to complete a W9 because they're only for US citizens and residents and see where the conversation goes from there.

They still need to declare and classify their expense, so may need you to complete some other paperwork, but it doesn't really effect anything about your own tax obligations or filing requirements. Don't worry about it.