Reference for Bava Batra 334:1

כותבין שטר ללוה אע"פ שאין מלוה עמו ואין כותבין למלוה עד שיהא לוה עמו והלוה נותן שכר

A BOND MAY BE WRITTEN FOR A BORROWER THOUGH THE LENDER IS NOT PRESENT.<span class="x" onmousemove="('comment',' Lit., 'with him'. ');">¹</span> IT [MUST] NOT, HOWEVER, BE WRITTEN FOR THE LENDER UNLESS THE BORROWER IS WITH HIM. THE FEE<span class="x" onmousemove="('comment',' For the writing of the document. ');">²</span> IS PAID BY THE BORROWER. A DEED [OF SALE] MAY BE WRITTEN FOR THE SELLER IN THE ABSENCE OF THE BUYER.<span class="x" onmousemove="('comment',' Lit., 'though the buyer is not with him'. ');">³</span>

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