Salut, j´aimerais juste que quelqu´un puisse jeter un œil sur cette petite lettre que j´ai à faire en anglais (en réponse à une lettre qu´on a étudiée), et corrige les éventuelles (il doit surement y en avoir) fautes présentes dedans ;)
Merci d´avance.

"Dear Mr. Cliff,
I have received your letter about the uncleared Invoice n° … and I must say that I had been surprised. This invoice has been already paid.

I paid you …£ by a cheq I sent you the 4th of September. Here are the details of this payment: Cheq n°102455001, dated from September 3rd, …£, from the Welsh Cooperativ Bank.

My bank statement of September shows that the amount of this invoice has been debited of my account. I think the problem can’t come from my side, so I suggest you to check your bank or your Compatibility department.

If you have any problem with that, let us know as soon as possible.

Yours sincerely "

"I think the problem can’t come from my side"

mets plutot beyond my will/control

"
I paid you …£ by a cheq I sent you the 4th of Septembe"

i paid you ... by cheq which i sent you the ....

je ne suis pas sur pour la derniére phrase mais on dit i paid by cheq

Je dirai "I received your letter", "I was surprised", "paid you by cheq which had been sent the 4th"...

Merci pour ces corrections