A Computer Check is created to pay an invoice record for a particular Vendor in the system.

A Manual Check is used to record a check that was hand written outside of The Financial Edge for an invoice and  vendor in the system. Note: Manual checks are not printed

A One-time Check is used in scenarios where a person or Vendor that needs to be paid will only be paid a minimal number of times. These payees do not have a vendor record or invoice record in the system.