A multi-homed AS is one which is connected to more than one other AS. An AS also qualifies as multihomed if it is connected to a public Internet Exchange Point.
In the ASN request form, you will be asked to provide the estimate ASN implementation date, two peer AS numbers and their contact details. It is also acceptable if your network only connect to an IXP.
So what if I only have one upstream provider and doesn't have a Public IX in place? What If I just whois any member from my country and provide AS numbers and contact details publicly available? Do you check back after 3 months that the AS you provided to the applicant is actually peering with the ones they mentioned in the application? Do you send email notification to those contacts provided in the application that XYZ has mentioned your AS to be peer with in future?