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in localbitcoins we have address to receive bitcoins.

In Coinbase we can create multiple addresses for bitcoin.

Now which one do I use to receive and which one to transact and sell/trade?

because the address in localbitcoins is shown as invalid at some free bitcoin generation sites/ while the coinbase addresses work

closed as unclear what you're asking by Stéphane Gimenez, Murch, dchapes, Nick ODell, John T Feb 3 '14 at 7:38

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