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[dcd722]

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[achow101]

Certainly. You can have the hex of the signed transaction in a text file, and once you need to broadcast the transaction, copy and paste the hex of transaction into any transaction broadcaster service.

[DannyHamilton]

Be aware however that the stored transaction is only valid as long as you don't spend any of the inputs.

If (after backing up the transaction), you create a transaction that spends any of the same inputs as your backed up transaction, then your backed up transaction becomes invalid and is useless to you.