How do I enter solar panel payments received from a utility if I don't receive enough for them to generate a 1099-MISC and they will not disclose their EIN?

We receive a payment from the utility of we generate more electricity than we use over the course of the year. The amount is less than the $600 required to generate a 1099-MISC. If I try to enter the amount as a 1099-MISC anyway (as you would for interest earned less than $10), the software requires an EIN which the utility will not provide.