On document print reports — typically for cash and bank documents — you'll find the fields Issued by / Approved by and Posted by. ABRA Flexi does not fill them in automatically; they print blank.
They are intended for the manual signature of responsible persons after the document has been printed.
ℹ️ This is not a bug or an incomplete setup — these fields are specifically meant for a handwritten signature.
I need the user's name on the report
If you need the name of the user printing the document to appear on the report, this is possible for some reports. The procedure is described in the article Can the first or last name of the user printing the document be printed on the report?