Hello, i have received a payment from someone buying a item from me via gumtree but the payment he sent is on hold, he sent a further £3 for upgraded postage and it come right through I received an email to say its on hold till 7th december if no problems come up and if i want it to clear sooner i have to add a tracking number i'm concerned its a scam, i dont want to send a product without cleared payment is this a scam? Dan
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