The buyer has 72 hours from the date of issue to stop-payment on a cashiers check. Sounds like he stopped payment before he received your amplifier.
In other words his lack of knowledge is bogus. Perhaps he intends to make good on the check now that he has the amp. If not, request in writing that he return the amp to you
immediately.
Also contact the District Attorney in his area and explain that this is not only a breach of contract issue but it is also a fraud, both state and federal(i.e., there is an intent to defraud if he keeps the amp and refuses to pay).
Keep the original cashiers check, don't return it to the buyer or hand it over to authorities, they will accept photo copies.
Consider retaining an attorney in the buyers area to file suit against the buyer. Raise hell, you'll get results.
In other words his lack of knowledge is bogus. Perhaps he intends to make good on the check now that he has the amp. If not, request in writing that he return the amp to you
immediately.
Also contact the District Attorney in his area and explain that this is not only a breach of contract issue but it is also a fraud, both state and federal(i.e., there is an intent to defraud if he keeps the amp and refuses to pay).
Keep the original cashiers check, don't return it to the buyer or hand it over to authorities, they will accept photo copies.
Consider retaining an attorney in the buyers area to file suit against the buyer. Raise hell, you'll get results.