HCFA AUDIT RULES (Field 6)

Forms must be keyed in all CAPITAL LETTERS.
  
“Key what you see” means to literally key what you see. You are trying to replicate the form as it was submitted; you cannot fix errors.

Field No	HCFA	COMMON VALUES	RULE
6	H06_Relationship_to_Insured	Only allowed values: S P C O	S=Self   P=Spouse   C=Child   O=Other