diff --git a/openprocurement/auctions/core/models/schema.py b/openprocurement/auctions/core/models/schema.py
index bb14943c..24ce451c 100644
--- a/openprocurement/auctions/core/models/schema.py
+++ b/openprocurement/auctions/core/models/schema.py
@@ -413,6 +413,14 @@ class dgfCDB2Document(dgfDocument):
     ])
 
 
+class AuctionDocument(dgfCDB2Document):
+    """
+    Override dgfCDB2Document model
+    Append auction choice in doucmentOf field
+    """
+    documentOf = StringType(required=True, choices=['auction', 'item', 'lot', 'tender'], default='auction')
+
+
 class swiftsureDocument(dgfDocument):
     documentOf = StringType(
         required=True,
@@ -655,6 +663,35 @@ class dgfCancellation(BaseCancellation):
                          validate_disallow_dgfPlatformLegalDetails])
 
 
+class AuctionCancellationDetailsDocument(AuctionDocument):
+    """
+    Override cancellation documents model
+    Append cancellationDetails choice to documenTtype
+    """
+    documentType = StringType(choices=[
+        'auctionNotice', 'awardNotice', 'contractNotice',
+        'notice', 'biddingDocuments', 'technicalSpecifications',
+        'evaluationCriteria', 'clarifications', 'shortlistedFirms',
+        'riskProvisions', 'billOfQuantity', 'bidders', 'conflictOfInterest',
+        'debarments', 'evaluationReports', 'winningBid', 'complaints',
+        'contractSigned', 'contractArrangements', 'contractSchedule',
+        'contractAnnexe', 'contractGuarantees', 'subContract',
+        'eligibilityCriteria', 'contractProforma', 'commercialProposal',
+        'qualificationDocuments', 'eligibilityDocuments', 'tenderNotice',
+        'illustration', 'auctionProtocol', 'x_dgfAssetFamiliarization',
+        'x_presentation', 'x_nda', 'cancellationDetails'
+    ])
+
+
+class AuctionCancellation(BaseCancellation):
+    """
+    Override auction cancellation model
+    include cancellation details in documentType
+    """
+    documents = ListType(ModelType(AuctionCancellationDetailsDocument), default=list())
+
+
+
 class swiftsureCancellation(BaseCancellation):
     documents = ListType(
         ModelType(swiftsureCancellationDocument),
diff --git a/openprocurement/auctions/core/utils.py b/openprocurement/auctions/core/utils.py
index 0b679102..55c6d4f1 100644
--- a/openprocurement/auctions/core/utils.py
+++ b/openprocurement/auctions/core/utils.py
@@ -585,3 +585,44 @@ def generate_rectificationPeriod_tender_period_margin(auction, tp_margin=MINIMAL
         period.endDate = calculated_endDate if calculated_endDate > now else now
     period.invalidationDate = None
     return period
+
+
+def change_document_of(document):
+    """
+    Only for migration
+    Function that change documnet_of attribute in auction's document
+    :param document:
+    :return: True if document was changed else False
+    """
+    if document and document['documentOf'] == 'tender':
+        document.update({
+            'documentOf': 'auction'
+        })
+        return True
+    return False
+
+
+def migrate_all_document_of_tender(auction):
+    """
+    Change documentOf to auction if it was tender to auction
+    Iterate through keys of auctions and get the array of needed type if it exists
+    Iterate through array of needed type and get array of documents if it exists
+    Call function that change document_of attribute of document and get execution result (true or false)
+    if auction wasn't change before set is_changed_auction_data to true
+    :param auction:
+    :return: boolean True if document was changed else False
+    """
+
+    is_changed_auction_data = False
+
+    for _type in ['bids', 'awards', 'contracts', 'cancellations']:
+        for type_obj in auction.get(_type, []):
+            for document in type_obj.get('documents', []):
+                is_change_document = change_document_of(document)
+                is_changed_auction_data = is_changed_auction_data or is_change_document
+
+    for auction_document in auction.get('documents', []):
+        is_change_document = change_document_of(auction_document)
+        is_changed_auction_data = is_changed_auction_data or is_change_document
+
+    return is_changed_auction_data