Hi @SohanurRahman,
There are numerous reasons as to why someone isn't able to send money. It could be that our security system is denying the payment, their funding method doesn't have enough money, the payment can't go through because of a restriction, or the email address the payment is going to isn't attached to an account. I would recommend having the buyer reach out to our phone support team so they can tell them why they aren't able to send a payment.
Thanks,
Drew
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