How do I categorize transfers (short term liability) between businesses?

@jillcashjohnson- 

Let's use the example of Co. A loaning money to Co. B: 

In Co. A, create an asset account called 'Due from Co. B' and assign the transfer/payment to that account. 

In Co. B, create a liability account called 'Due to Co. A' and assign that account to the deposit. 

When Co. B repays Co. A, in Co. B assign the transfer/payment made to the 'Due to Co. A' liability account. 

When Co. A receives the payment from Co. B, assign the 'Due from Co. B' asset account to the deposit. 

Repeat as needed.