Question 1
If an endorser signs his name and adds the words "Sans Recourse", it means:
"Sans Recourse" means "without recourse". By adding this, the endorser denies liability to any subsequent holder if the instrument is dishonored.
Question 2
An endorsement where the endorser signs his name and adds a direction to pay the amount to a specific person is called:
A "Full" or "Special" endorsement specifies the person to whom or to whose order the money is to be paid (e.g., "Pay to B or Order" signed A). This converts a bearer instrument back into an order instrument, adding security.
Question 3
Endorsement "in blank" means:
An endorsement in blank (just the signature) converts an Order instrument into a Bearer instrument, meaning it can now be transferred by mere delivery.