user26880: I understand a transaction in Bitcoin is created in two parts:
1) Sender 'A' creates a claim condition using scriptPubKey
2) Recipient 'B' proves ownership of the recipient address using scriptSig
I am wondering whether step 1 also involves the sender 'A' signing something as a part of the claim condition using their own private key? 

user51948: No, the scriptPubKey doesn't require 'A' to sign anything. It only asserts what B must do to spend the output.

26880: <p>I understand a transaction in Bitcoin is created in two parts:</p>

<p>1) Sender 'A' creates a claim condition using scriptPubKey</p>

<p>2) Recipient 'B' proves ownership of the recipient address using scriptSig</p>

<p>I am wondering whether step 1 also involves the sender 'A' signing something as a part of the claim condition using their own private key? </p>
 51948: <p>No, the scriptPubKey doesn't require 'A' to sign anything. It only asserts what B must do to spend the output.</p>
