receipt(Party B shall issue a written receipt to Party A within seven (7) days of receipt of each payment received under clause [ ] of this contract, confirming the amount of payment made and the date on which it was received. LE2 Alexander Demidov)
signed acknowledgement of receipt(Service is complete on the date the signed acknowledgement of receipt is mailed or delivered to the sender. The signed acknowledgement of receipt shall constitute proof of service. Alexander Demidov)