[amsat-bb] QSL Etiquette

I was wondering what others may be doing when they receive an "questionnable" request for a QSL. Last week while on vacation in Orlando I attempted to make some AO51 contacts with a handheld station. Althought I was receiving many stations, I was unsuccesful in establishing a contact and never heard anyone call me back. I must have been getting out though as I have received an eQSL request from a South American station. Is it normal practice to ignore the request or to reply with refusal to QSL. If it were a mistaken callsign situation I would reply with a "sorry" but in the case of a bogus request I was wondering what others may be doing. Next time I will use a better antenna hi hi. Thanks & 73 Ian VE9IM