The BBC report:
Councils in Wales wrote-off £8.5m in business rates and £6.6m in council tax debt in the last financial year, BBC Wales has learned.
In all, councils wrote-off over 32,000 individual council tax debts and over 3,000 individual business rate debts.
The Welsh Local Government Association said the 22 Welsh councils had a good record, with a collection rate of 97%.