The details of a Payment for an existing contact.
    
        
        
            
                
                    
                    
                    
                    
                
                
                    
                        | Name | 
                        Type | 
                        Description | 
                        Required | 
                    
                
                
        
                
                    | Id | 
                    Int32 (Nullable) | 
                    The unique id of the payment. | 
                    No | 
                
        
                
                    | ContactId | 
                    Int32 | 
                    The Id of the associated Contact. | 
                    No | 
                
        
                
                    | DemandId | 
                    Int32 (Nullable) | 
                    The Id of the Payment Demand being paid. This must be entered if the payment is for a subscription. | 
                    No | 
                
        
                
                    | DonationId | 
                    Int32 (Nullable) | 
                    The Id of the fund (donation) if the payment is for a donation. Lookup: Funds list. | 
                    No | 
                
        
                
                    | Amount | 
                    Decimal | 
                     | 
                    No | 
                
        
                
                    | TransactionDate | 
                    DateTime | 
                     | 
                    No | 
                
        
                
                    | Comments | 
                    String | 
                     | 
                    No | 
                
        
                
                    | PaymentMethodId | 
                    Int32 (Nullable) | 
                     | 
                    No | 
                
        
                
            
        
        
            
            
            
                    
                        
                            
                            
                            
                        
                        
                            
                                | Url | 
                                Actions | 
                                Description | 
                            
                        
                        
                
                        
                            | api/payment
                             | POST | 
                            Adds a Payment for an existing subscription demand or a donation. |