need to check with you all this.
1) guarantee given by customer - this is being asset or liabilities. to me it seems like a liabilities as it is not a receivable yet but why the account assigned is asset account when do f-38.
2) guarantee given to vendor - this is being asset or liabilities. to me it seems like an asset as it is not a payable yet. but it get posted to liabilities account during f-55.