Plaintiff finance company followed a policy of refusing to take up negotiable notes from appliance dealers unless the notes were accompanied by a statement signed by the maker of the note that all merchandise had been installed. A dealer forged the signature of defendant maker on the certificate, warranting that all merchandise had been installed. Plaintiff finance company sued the maker on the note. Held: the finance company forfeited its status as a holder in due course by requiring the additional instrument as a condition precedent to acceptance of the note. The court reasoned that since the finance company required the certificate of installation, it was to be held as an original party not only to the certificate but also to the note which accompanied it, and would be subject to all defenses maker could set up on either instrument