There are no restrictions on the minimum amount of the Guarantee Fund. "Invoicebox" recommends to define the amount of the Guarantee Fund based on the needs of the company in making purchases of buying tickets with postpayment. It is important to know that the Guarantee Fund cannot be used for payment of purchases. The amount of the Guarantee Fund is refunded in full after the expiration of the contract in the absence of the payer's arrear with payments.
