If you wrote the check, the only way to guarantee that you will not be liable for it longer than six months is to place a stop payment order on it. According to Bankrate.com, an oral stop-payment order expires after 14 days and a written stop-payment order expires in six months.
Mb-a unit of information equal to 1000 kilobits or 10^6 (1,000,000) bits. Mbit, megabit. computer memory unit-a unit for measuring computer memory. kb, kbit, kilobit-a unit of information equal to 1000 bits. Gbit, gigabit, Gb-a unit of information equal to 1000 megabits or 10^9 (1,000,000,000) bits.
A 1-KB file is composed of 1,000 bytes of data, a 1-MB file is composed of 1 million bytes of data and a 1-GB file is composed of 1 billion bytes of data. KB stands for kilobytes, MB stands for megabytes and GB stands for gigabytes, as kilo, mega and giga are metric system prefixes for thousand, million and billion. The abbreviation for byte is B..