An Indian seller received a threat of legal action from a customer in Dubai regarding the refund of an advance payment after the customer cancelled a purchase order. The seller is seeking advice on whether a Dubai party can issue a legal notice for money recovery and if they can counter-sue for mental harassment or fraud, especially since no formal contract was signed beyond the PO and proforma invoice. The consensus is that legal notices can be issued regardless of location, and specific grounds like fraud must be substantiated. Professional legal advice from a local lawyer is strongly recommended to navigate the specifics of the transaction and contract terms.