diff --git a/src/main/java/com/eactive/apim/portal/agreements/service/AgreementsService.java b/src/main/java/com/eactive/apim/portal/agreements/service/AgreementsService.java
index 864ea45..7b1e1ef 100644
--- a/src/main/java/com/eactive/apim/portal/agreements/service/AgreementsService.java
+++ b/src/main/java/com/eactive/apim/portal/agreements/service/AgreementsService.java
@@ -6,6 +6,7 @@ import com.eactive.apim.portal.agreements.entity.AgreementsId;
 import com.eactive.apim.portal.agreements.entity.AgreementsStatus;
 import com.eactive.apim.portal.agreements.repository.AgreementsRepository;
 import com.eactive.apim.portal.common.exception.NotFoundException;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -16,6 +17,7 @@ import java.util.Optional;
 
 @Service
 @Transactional
+@Slf4j
 public class AgreementsService {
 
     private static final String NOT_FOUND_MESSAGE = "해당 버전의 약관이 존재하지 않습니다.";
@@ -111,6 +113,7 @@ public class AgreementsService {
     public List<Agreements> findAllAgreementsSortPublishedOn(AgreementType agreementType) {
         List<Agreements> agreements = agreementsRepository.findAllByAgreementsTypeOrderByPublishedOnDesc(agreementType);
         if(agreements.isEmpty()) {
+            log.error("해당 약관 종류의 약관이 존재하지 않습니다. agreementType={}", agreementType);
             throw new IllegalStateException(NOT_FOUND_BY_DATE_MESSAGE);
         }
         return agreements;
diff --git a/src/main/java/com/eactive/apim/portal/invitation/entity/UserInvitation.java b/src/main/java/com/eactive/apim/portal/invitation/entity/UserInvitation.java
index 77fc5ed..7533a2c 100644
--- a/src/main/java/com/eactive/apim/portal/invitation/entity/UserInvitation.java
+++ b/src/main/java/com/eactive/apim/portal/invitation/entity/UserInvitation.java
@@ -1,6 +1,7 @@
 package com.eactive.apim.portal.invitation.entity;
 
 import com.eactive.apim.portal.invitation.entity.UserInvitationEnums.InvitationStatus;
+import com.eactive.apim.portal.jpa.PersonalDataEncryptConverter;
 import com.eactive.eai.data.converter.LocalDateTimeToStringConverter14;
 import lombok.Data;
 import org.hibernate.annotations.Comment;
@@ -29,10 +30,15 @@ public class UserInvitation {
     @Comment("기관ID")
     private String orgId;
 
-    @Column(name = "INVITATION_EMAIL", length = 30, nullable = false)
+    @Column(name = "INVITATION_EMAIL", length = 256)
     @Comment("초대이메일")
     private String invitationEmail;
 
+    @Column(name = "INVITATION_MOBILE", length = 256)
+    @Convert(converter = PersonalDataEncryptConverter.class)
+    @Comment("초대휴대폰")
+    private String invitationMobile;
+
     @Column(name = "INVITATION_DATE", length = 14, nullable = false)
     @Convert(converter = LocalDateTimeToStringConverter14.class)
     @Comment("초대일시")
diff --git a/src/main/java/com/eactive/apim/portal/invitation/repository/UserInvitationRepository.java b/src/main/java/com/eactive/apim/portal/invitation/repository/UserInvitationRepository.java
index f79fe17..a87cee9 100644
--- a/src/main/java/com/eactive/apim/portal/invitation/repository/UserInvitationRepository.java
+++ b/src/main/java/com/eactive/apim/portal/invitation/repository/UserInvitationRepository.java
@@ -22,4 +22,11 @@ public interface UserInvitationRepository extends JpaRepository<UserInvitation,
     Optional<UserInvitation> findFirstByInvitationEmailAndOrgIdAndStatus(String email, String orgId, InvitationStatus status);
 
     Optional<UserInvitation> findFirstByInvitationEmailAndOrgId(String email, String orgId);
+
+    // 휴대폰 번호 기반 초대 조회 (INVITATION_MOBILE 은 결정적 암호화로 저장되어 equality 조회 가능)
+    Optional<UserInvitation> findFirstByInvitationMobileAndStatus(String mobile, InvitationStatus status);
+
+    Optional<UserInvitation> findFirstByInvitationMobileAndOrgIdAndStatus(String mobile, String orgId, InvitationStatus status);
+
+    Optional<UserInvitation> findFirstByInvitationMobileAndOrgId(String mobile, String orgId);
 }
diff --git a/src/main/java/com/eactive/apim/portal/portaluser/repository/PortalUserRepository.java b/src/main/java/com/eactive/apim/portal/portaluser/repository/PortalUserRepository.java
index 228f501..11b57fb 100644
--- a/src/main/java/com/eactive/apim/portal/portaluser/repository/PortalUserRepository.java
+++ b/src/main/java/com/eactive/apim/portal/portaluser/repository/PortalUserRepository.java
@@ -30,6 +30,9 @@ public interface PortalUserRepository extends BaseRepository<PortalUser, String>
 
     boolean existsByMobileNumber(String mobileNumber);
 
+    // 휴대폰 번호 기반 기존 회원 조회 (mobileNumber 는 유니크 제약이 없어 다건 가능)
+    List<PortalUser> findAllByMobileNumber(String mobileNumber);
+
     @Query("SELECT u FROM PortalUser u WHERE u.portalOrg = :org AND u.userStatus != :status")
     Page<PortalUser> findActiveUsers(@Param("org") PortalOrg org, @Param("status") PortalUserEnums.UserStatus status, Pageable pageable);