As u mentioned in ur question that the amount of expenditure paid to the party in previous year & the party has waived off in current year , it means the service is expected to get in current year from the party & party has waived off in current year so in prevoius year it should be treated as advance & no further adjustment need to be done in current year .
entry in previous year
1) Advance to party A/c Dr. 8L
To Cash 8L
If the party had provided the service in current year then this following entry would have passed
2) Expenses A/c Dr.
To Advance to party
& consequently expenses amount would transferred in P/L
but becoz it did not happen so we have no need to passthe entry no.2