Dear Felix
I would like to thank you for granting us the opportunity try your [PRODUCT (S), ex. Power line Accounting Software Package] for a trial period. After careful consideration, we have determined that [REASON FOR RETURN, ex. the software is not suitable for our unique type of business, which demands simultaneous use of FIFO, LIFO and specific identification inventory accounting regimes].
I regret, therefore, that we must ask for a return. [STATE HOW PRODUCT (S) WILL BE RETURNED, ex. I have enclosed the software and documentation.] {STATE HOW YOU WOULD LIKE CREDIT, IF ANY, TO BE HANDLED, ex. Please forward a refund check to us at your earliest convenience.}
Regards
Lydia