Avoid One time supplier

Hi All,
Is there any way to avoid creating one time supplier???

Example :- Mr. A is not our regular supplier but only one time due to emergency we purchase material from him.
So can we avoid creating Mr. A as supplier as we are not going to buy material from him next time.

Can we create as Miscellaneous supplier and make entries?
Is at the time of Audit, Auditor going to satisfied if tell them that for one time supplier we created a miscellaneous supplier.????

Kindly suggest.

Regards,
Kapil