diff --git a/api/src/main/java/ca/bc/gov/educ/studentdatacollection/api/rules/validationrules/impl/DuplicatePenRule.java b/api/src/main/java/ca/bc/gov/educ/studentdatacollection/api/rules/validationrules/impl/DuplicatePenRule.java
deleted file mode 100644
index 03358ff0f..000000000
--- a/api/src/main/java/ca/bc/gov/educ/studentdatacollection/api/rules/validationrules/impl/DuplicatePenRule.java
+++ /dev/null
@@ -1,56 +0,0 @@
-package ca.bc.gov.educ.studentdatacollection.api.rules.validationrules.impl;
-
-import ca.bc.gov.educ.studentdatacollection.api.calculator.FteCalculatorUtils;
-import ca.bc.gov.educ.studentdatacollection.api.constants.StudentValidationFieldCode;
-import ca.bc.gov.educ.studentdatacollection.api.constants.StudentValidationIssueSeverityCode;
-import ca.bc.gov.educ.studentdatacollection.api.constants.StudentValidationIssueTypeCode;
-import ca.bc.gov.educ.studentdatacollection.api.rules.ValidationBaseRule;
-import ca.bc.gov.educ.studentdatacollection.api.service.v1.ValidationRulesService;
-import ca.bc.gov.educ.studentdatacollection.api.struct.StudentRuleData;
-import ca.bc.gov.educ.studentdatacollection.api.struct.v1.SdcSchoolCollectionStudentValidationIssue;
-import lombok.extern.slf4j.Slf4j;
-import org.apache.commons.lang3.StringUtils;
-import org.springframework.core.annotation.Order;
-import org.springframework.stereotype.Component;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- *  | ID  | Severity | Rule                                                                  | Dependent On |
- *  |-----|----------|-----------------------------------------------------------------------|--------------|
- *  | V21 | ERROR    | A PEN can only appear once in a school.                               | V02          |
- */
-@Component
-@Slf4j
-@Order(320)
-public class DuplicatePenRule implements ValidationBaseRule {
-
-    private final ValidationRulesService validationRulesService;
-
-    public DuplicatePenRule(ValidationRulesService validationRulesService) {
-        this.validationRulesService = validationRulesService;
-    }
-
-    @Override
-    public boolean shouldExecute(StudentRuleData studentRuleData, List<SdcSchoolCollectionStudentValidationIssue> validationErrorsMap) {
-        log.debug("In shouldExecute of DuplicatePenRule-V21: for collectionType {} and sdcSchoolCollectionStudentID :: {}" , FteCalculatorUtils.getCollectionTypeCode(studentRuleData),
-                studentRuleData.getSdcSchoolCollectionStudentEntity().getSdcSchoolCollectionStudentID());
-        return isValidationDependencyResolved("V21", validationErrorsMap);
-    }
-
-    @Override
-    public List<SdcSchoolCollectionStudentValidationIssue> executeValidation(StudentRuleData studentRuleData) {
-        var studentEntity = studentRuleData.getSdcSchoolCollectionStudentEntity();
-        log.debug("In executeValidation of DuplicatePenRule-V21 for sdcSchoolCollectionStudentID ::" + studentEntity.getSdcSchoolCollectionStudentID());
-        final List<SdcSchoolCollectionStudentValidationIssue> errors = new ArrayList<>();
-        if(StringUtils.isNotEmpty(studentEntity.getStudentPen())) {
-            Long penCount = validationRulesService.getDuplicatePenCount(studentEntity.getSdcSchoolCollection().getSdcSchoolCollectionID(), studentEntity.getStudentPen());
-            if ((penCount > 1) || (penCount == 1 && studentEntity.getSdcSchoolCollectionStudentID() == null)) {
-                log.debug("DuplicatePenRule-V21: Duplicate PEN's found - count {} for PEN number, sdcSchoolCollectionStudentID  :: {}" , penCount, studentEntity.getSdcSchoolCollectionStudentID());
-                errors.add(createValidationIssue(StudentValidationIssueSeverityCode.ERROR, StudentValidationFieldCode.STUDENT_PEN, StudentValidationIssueTypeCode.STUDENT_PEN_DUPLICATE));
-            }
-        }
-        return errors;
-    }
-}
diff --git a/api/src/test/java/ca/bc/gov/educ/studentdatacollection/api/rules/RulesProcessorTest.java b/api/src/test/java/ca/bc/gov/educ/studentdatacollection/api/rules/RulesProcessorTest.java
index 6de9c9f59..fc0911592 100644
--- a/api/src/test/java/ca/bc/gov/educ/studentdatacollection/api/rules/RulesProcessorTest.java
+++ b/api/src/test/java/ca/bc/gov/educ/studentdatacollection/api/rules/RulesProcessorTest.java
@@ -467,39 +467,6 @@ void testDuplicatePenRule() {
         assertThat(validationDigitError.get(0).getValidationIssueCode()).isEqualTo("PENCHECKDIGITERR");
     }
 
-    @Test
-    void testDuplicatePenRuleFound() {
-        var collection = collectionRepository.save(createMockCollectionEntity());
-        var sdcSchoolCollectionEntity = sdcSchoolCollectionRepository.save(createMockSdcSchoolCollectionEntity(collection, null));
-        val entity = createMockSchoolStudentEntity(sdcSchoolCollectionEntity);
-        entity.setEnrolledGradeCode("08");
-        entity.setStudentPen("120164447");
-        entity.setCreateDate(LocalDateTime.now().minusMinutes(14));
-        entity.setUpdateDate(LocalDateTime.now());
-        entity.setCreateUser(ApplicationProperties.STUDENT_DATA_COLLECTION_API);
-        entity.setUpdateUser(ApplicationProperties.STUDENT_DATA_COLLECTION_API);
-
-        val entity2 = createMockSchoolStudentEntity(sdcSchoolCollectionEntity);
-        entity2.setStudentPen("120164447");
-        entity2.setCreateDate(LocalDateTime.now().minusMinutes(14));
-        entity2.setUpdateDate(LocalDateTime.now());
-        entity2.setCreateUser(ApplicationProperties.STUDENT_DATA_COLLECTION_API);
-        entity2.setUpdateUser(ApplicationProperties.STUDENT_DATA_COLLECTION_API);
-        sdcSchoolCollectionStudentRepository.save(entity2);
-
-        val savedEntityTwo = sdcSchoolCollectionStudentRepository.findById(entity2.getSdcSchoolCollectionStudentID());
-        assertThat(savedEntityTwo).isPresent();
-
-        val dupePenCount = sdcSchoolCollectionStudentRepository.countForDuplicateStudentPENs(entity.getSdcSchoolCollection().getSdcSchoolCollectionID(), entity.getStudentPen());
-        assertThat(dupePenCount).isEqualTo(1);
-
-        entity.setStudentPen("120164447");
-        PenMatchResult penMatchResult = getPenMatchResult();
-        when(this.restUtils.getPenMatchResult(any(),any(), anyString())).thenReturn(penMatchResult);
-        val validationErrorDupe = rulesProcessor.processRules(createMockStudentRuleData(entity, createMockSchool()));
-        assertThat(validationErrorDupe.size()).isNotZero();
-    }
-
     @Test
     void testHomeSchoolRule() {
         var collection = collectionRepository.save(createMockCollectionEntity());