diff --git a/strr-host-pm-web/app/interfaces/host-api.ts b/strr-host-pm-web/app/interfaces/host-api.ts
index f30c27ec..15359a91 100644
--- a/strr-host-pm-web/app/interfaces/host-api.ts
+++ b/strr-host-pm-web/app/interfaces/host-api.ts
@@ -1,5 +1,5 @@
 export interface ApiHostParty extends ApiParty {
-  preferredName: string
+  preferredName?: string
 }
 
 export interface ApiHostPartyWithAddress extends ApiHostParty {
@@ -7,22 +7,25 @@ export interface ApiHostPartyWithAddress extends ApiHostParty {
 }
 
 export interface ApiHostContactDetails extends ApiPhone {
-  preferredName: string
+  preferredName?: string
   faxNumber: string
   emailAddress: string
 }
 
-export interface ApiHostContactBusiness extends ApiHostBusinessDetails {
-  contactType: OwnerType,
+export interface ApiHostBaseBusiness {
   name: {
     firstName: string
-    middleName: string
+    middleName?: string
     lastName: string
   }
   details: ApiHostContactDetails
   mailingAddress: ApiAddress
 }
 
+export interface ApiHostContactBusiness extends ApiHostBaseBusiness {
+  contactType: OwnerType
+}
+
 export interface ApiHostContactPerson extends ApiHostContactBusiness {
   dateOfBirth?: string
   socialInsuranceNumber?: string
@@ -30,23 +33,23 @@ export interface ApiHostContactPerson extends ApiHostContactBusiness {
 
 export interface ApiPropertyManagerBusiness {
   legalName: string
-  businessNumber: string
+  businessNumber?: string
   mailingAddress: ApiAddress
   primaryContact: ApiHostParty
   secondaryContact?: ApiHostParty
 }
 
-export interface ApiPropertyManager extends ApiHostBusinessDetails {
+export interface ApiPropertyManager {
   initiatedByPropertyManager: boolean
-  type: OwnerType
+  propertyManagerType: OwnerType
   business?: ApiPropertyManagerBusiness // required if OwnerType.BUSINESS
   contact?: ApiHostPartyWithAddress // required if OwnerType.INDIVIDUAL
 }
 
 export interface ApiUnitDetails {
-  parcelIdentifier: string
-  businessLicense: string
-  businessLicenseExpiryDate: string
+  parcelIdentifier?: string
+  businessLicense?: string
+  businessLicenseExpiryDate?: string
   propertyType: PropertyType | undefined
   ownershipType: OwnershipType | undefined
   rentalUnitSpaceType: RentalUnitType | undefined
diff --git a/strr-host-pm-web/app/utils/host-formatting.ts b/strr-host-pm-web/app/utils/host-formatting.ts
index 877d2def..d7b6c3db 100644
--- a/strr-host-pm-web/app/utils/host-formatting.ts
+++ b/strr-host-pm-web/app/utils/host-formatting.ts
@@ -3,19 +3,19 @@ export function formatOwnerHostAPI (owner: HostOwner): ApiHostContactPerson {
     contactType: owner.ownerType,
     name: {
       firstName: owner.firstName || '',
-      middleName: owner.middleName || '',
+      ...(owner.middleName ? { middleName: owner.middleName } : {}),
       lastName: owner.lastName || ''
     },
     details: {
-      preferredName: owner.preferredName || '',
+      ...(owner.preferredName ? { preferredName: owner.preferredName } : {}),
       emailAddress: owner.emailAddress || '',
       phoneCountryCode: owner.phone.countryCode || '',
       phoneNumber: owner.phone.number || '',
       extension: owner.phone.extension || '',
       faxNumber: owner.faxNumber || ''
     },
-    dateOfBirth: owner.dateOfBirth || '',
-    socialInsuranceNumber: owner.taxNumber || '',
+    ...(owner.dateOfBirth ? { dateOfBirth: owner.dateOfBirth } : {}),
+    ...(owner.taxNumber ? { socialInsuranceNumber: owner.taxNumber } : {}),
     mailingAddress: formatAddress(owner.mailingAddress)
   }
 }
@@ -47,23 +47,23 @@ export function formatOwnerHostUI (
 export function formatOwnerPropertyManagerAPI (owner: HostOwner): ApiPropertyManager {
   return {
     initiatedByPropertyManager: owner.isCompParty,
-    type: owner.ownerType,
+    propertyManagerType: owner.ownerType,
     ...(owner.ownerType === OwnerType.INDIVIDUAL
       ? {
           contact: {
             ...formatParty(owner),
-            preferredName: owner.preferredName || '',
+            ...(owner.preferredName ? { preferredName: owner.preferredName } : {}),
             mailingAddress: formatAddress(owner.mailingAddress)
           }
         }
       : {
           business: {
             legalName: owner.businessLegalName,
-            businessNumber: owner.businessNumber,
+            ...(owner.businessNumber ? { businessNumber: owner.businessNumber } : {}),
             mailingAddress: formatAddress(owner.mailingAddress),
             primaryContact: {
               ...formatParty(owner),
-              preferredName: owner.preferredName || ''
+              ...(owner.preferredName ? { preferredName: owner.preferredName } : {})
             }
           }
         }
@@ -73,7 +73,7 @@ export function formatOwnerPropertyManagerAPI (owner: HostOwner): ApiPropertyMan
 
 export function formatOwnerPropertyManagerUI (owner: ApiPropertyManager): HostOwner {
   return {
-    ownerType: owner.type,
+    ownerType: owner.propertyManagerType,
     firstName: owner.contact?.firstName || owner.business?.primaryContact?.firstName || '',
     middleName: owner.contact?.middleName || owner.business?.primaryContact?.middleName || '',
     lastName: owner.contact?.lastName || owner.business?.primaryContact?.lastName || '',
@@ -93,7 +93,6 @@ export function formatOwnerPropertyManagerUI (owner: ApiPropertyManager): HostOw
 
 export function formatHostUnitDetailsAPI (unitDetails: UiUnitDetails, blInfo: UiBlInfo): ApiUnitDetails {
   return {
-    parcelIdentifier: unitDetails.parcelIdentifier || '',
     propertyType: unitDetails.propertyType,
     ownershipType: unitDetails.ownershipType,
     numberOfRoomsForRent: unitDetails.numberOfRoomsForRent,
@@ -102,8 +101,9 @@ export function formatHostUnitDetailsAPI (unitDetails: UiUnitDetails, blInfo: Ui
       ? ResidenceType.SAME_UNIT
       : ResidenceType.ANOTHER_UNIT,
     rentalUnitSpaceType: unitDetails.typeOfSpace,
-    businessLicense: blInfo.businessLicense || '',
-    businessLicenseExpiryDate: blInfo.businessLicenseExpiryDate || ''
+    ...(unitDetails.parcelIdentifier ? { parcelIdentifier: unitDetails.parcelIdentifier } : {}),
+    ...(blInfo.businessLicense ? { businessLicense: blInfo.businessLicense } : {}),
+    ...(blInfo.businessLicenseExpiryDate ? { businessLicenseExpiryDate: blInfo.businessLicenseExpiryDate } : {})
   }
 }