Whenever I see requests from clients with very good budget for a project but the client have no verified payment, I become suspicious of the client's intent. About 95% of such clients have turned out to be scammers. Whenever I recieve invite for a project, I do take my time to check on the client's details and payment status. It is in your best interest to encourage the client to verify his/her payment status before you can start work on the project.
You can share your experience with such clients to help other Upworkers.
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