Debt ledger purchaser and consumer lender Credit Corp achieved double-digit growth in earnings in the December 2018 half-year, despite reduced debt purchasing in what it described as a "tight market".It has A$100 million available under its present banking facilities "in anticipation of increased investment opportunities".The company reported net profit of $33.6 million for the December half - an increase of 13 per cent over the previous corresponding period. Revenue was up from $147.6 million to $150.2 million over the same period.Revenue for the core business, Australia and New Zealand debt ledger purchasing, fell two per cent from $99.8 million to $97.3 million and segments profit was down 2 per cent, at $23 million.Credit Corp chief executive Thomas Beregi said he was pleased with the collections result, with earnings holding up despite a reduced investment in debt ledgers over the past couple of years.He said the Australian and New Zealand debt buying market was competitive, with limited purchasing opportunities that met the company's return criteria."We have seen some very high prices being paid for purchased debt ledgers by competitors. Our response is to remain disciplined and prepare ourselves for better opportunities in the periods ahead," Beregi said.The consumer lending division, Wallet Wizard, grew strongly, with 18 per cent growth in the loan book. Divisional revenue grew 18 per cent from $37.5 million to $44.4 million and profit was up 38 per cent, to $8 million.Credit Corp claims that its loans are the cheapest in the segment.The US debt ledger division's revenue grew from $10.2 million to $17.4 million, and profit was up from $807,000 to $3.8 million. Beregi said the investment pipeline in the US for the current year was 23 per cent higher than 2018.The company made no reference in its financial statement to a controversial investor report issued in the middle of last year, which criticised Credit Corp's business ethics (describing it as a payday lender), its handling of its responsible lending obligations and its accounting policies.It did report that there were no adverse orders or undertakings relating to its Australian and New Zealand debt buying business and a "low regulator complaint rate" in the US. And it underlined the fact that its loans are not "payday loans".