The Serial Number parameter defines the Prefix used to identify Serial Numbers when they are added to Transactions (Sales, Purchases, etc.). The default Serial Number Prefix is "S/N:".
When updating Serial Numbers on Inventory item records, the Serial Numbers are read from the Line Item Comment field.
All information between the Serial Number Prefix and the end of the line is used as the Serial Number. If the Serial Number Prefix is blank, the lines that do not contain a space in them are read as Serial Numbers.
Note: It is recommended to use a Serial Number Prefix, preferrably the default setting. If Serial Number Prefix is blank, adding text to Line Item Comments before the Serial Numbers that do not contain spaces causes problems and Serial numbers with spaces in them are not recognized.