post https://sandbox.asaas.com/api/v3/payments//receiveInCash
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When a customer makes a payment for a billing directly to you, without this payment being processed by Asaas, use this method to mark the billing as received in cash. This option is used to keep your history consistent in the system but does not generate a balance or make any financial changes to your account.
When confirming a cash receipt for a billing that has an ongoing negative balance, an activation fee for the negative balance service may be charged. Check this fee in the receivedInCashFeeValue field located in the return of the negative balance object.