A has already paid his house rent to his land lord B and obtained a receipt.  A lost the receipt.  A prepared a receipt for rent in lieu of the genuine receipt already lost and forged the signature of B, his landlord so that he may not be asked by B to pay the rent again. 

A has no account at his bankers.  But B supposes that A has and on that supposition B forges A’ s name on a cheque. 

A altered his date of birth in his High School certificate and produced a copy of the forged certificate to his employer B in order to deceive him to get an employment.