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db.createCollection("claims", 
    { validator : { $jsonSchema : { bsonType : "object", 
                 properties : { airportCode : { bsonType: "string"} }, 
                 additionalProperties: false} 
                  } } )
Insert
db.claims.insert({"airportCode" : "DSM"}) => result: "errmsg" : "Document failed validation"
if I remove "additionalProperties: false" by creating the collection, when I can insert the document. 
Any advice, how to keep "additionalProperties: false", because I want to control the document.
As at MongoDB 3.6.2, JSON Schema validation does not automatically add the default _id property, so you need to include a rule for this when using additionalProperties: false.
For example, assuming the default ObjectID:
db.createCollection("claims",
    { validator : {
        $jsonSchema : {
            bsonType : "object",
            properties : {
                _id: { bsonType: "objectId" },
                airportCode : { bsonType: "string"}
            additionalProperties: false
Two related issues to upvote/watch on the MongoDB Jira issue tracker:
SERVER-32160: provide warning when _id is not in list of properties and additionalProperties is false
SERVER-20547: Expose the reason an operation fails document validation
        
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