A '''Datadata Clarificationclarification Formform''' ('''DCF''')<ref>{{cite journal|doi=10.4103/0253-7613.93842|pmid=22529469|title=Data management in clinical research: An overview|journal=Indian Journal of Pharmacology|volume=44|issue=2|pages=168–72|year=2012|last1=Krishnankutty|first1=Binny|last2=Naveen Kumar|first2=BR|last3=Moodahadu|first3=Lathas|last4=Bellary|first4=Shantala|pmc=3326906}}</ref> or Data'''data Queryquery Formform''' is a questionnaire specifically used in [[Clinical trial|clinical research]]. The DCF is the primary data clarification tool from the trial sponsor or Contract[[contract Researchresearch Organizationorganization]] (CRO) towards the investigator to clarify discrepancies and ask the investigator for clarification. The DCF is part of the data validation process in a clinical trial.
