For every debit there is corresponding credit?

Not necessarily, every entry into the financial records of a busienss must balance with an equal value in debits as in credits however there could be different numbers of debtis and credits therefore not a one for one matching. For example: * Dr Sales 1,000 * Cr Debtors 1,150 * Dr VAT 150 This all nets out however there is more debits (dr) than credits (cr). This process is called double entry