Robert Hoult, 54, of Hollybush Road, Woodside,had pleaded not guilty to eight counts of fraud by false representation when he appeared at Shrewsbury Crown Court.
He was alleged to have changed the numbers and words on eight cheques written by John Wilde between November 2011 and March 2014.
But Mr Hoult said that it had been Mr Wilde who had altered the cheques.
Mr Wilde had an agreement with Mr Hoult that he could display his cars for sale at the car repair and valeting business in Tweedale, owned by the defendant, for £100 a month.
Tariq Shakoor, prosecuting, alleged that in April 2014 when Mr Wilde looked at his HSBC account he discovered eight cheques had been altered in some way and that it could have only been that the defendant had cashed them and altered them.
The court heard that when the defendant was interviewed by the police he agreed that the cheques had been altered but he said that he was not responsible for altering any of the cheques.
Mr Hoult first met Mr Wilde about five years ago and agreed to help sell his cars.
Adrian Roberts, defending, said that Mr Wilde had altered the cheques and had forgotten about it
He said Mr Wilde had altered a cheque before in front of the defendant’s wife.