Sources of estimation uncertainty

Non-current receivables Dec 31, 2012 Dec 31, 2011
Other interest-bearing loans to external parties 76 98
Other interest-bearing financial receivables 261 596
Other financial receivables 767 2,131
Other receivables 2,552 2,184
Non-current receivables as of December 311) 3,656 5,009
1) Of non-current receivables 1,190 (2,822) pertains to financial instruments.
Current receivables  Dec 31, 2012 Dec 31, 2011
Loans to external parties - 1
Other interest-bearing financial receivables 2,574 666
Accounts receivable 27,349 27,699
Prepaid expenses and accrued income 2,392 2,761
VAT receivables 3,573 3,387
Other financial receivables 1,220 1,746
Other receivables 5,304 5,932
Current receivables, after deduction of valuation allowances for doubtful accounts receivable1) 42,412 42,191

1) Of current receivables, 31,143  (30,133) pertains to financial instruments.

Credit risks in accounts receivable
Change of valuation allowance for doubtful accounts receivable Dec 31, 2012 Dec 31, 2011
Valuation allowance for doubtful accounts recivables as of December 31, preceding year 731 721
New valuation allowance charged to income 219 175
Reversal of valuation allowance charged to income (147) (126)
Utilization of valuation allowance related to actual losses (88) (100)
Acquired and divested operations 8 33
Translation differences (40) 5
Reclassifications, etc. (8) 24
Valuation allowance for doubtful accounts receivables as of December 31 675 731
Age analysis of portfolio value - Accounts receivable  Dec 31, 2012    Dec 31, 2011
  Not Due 1 -30 31-90 >90 Total   Not due 1 -30 31-90 >90 Total
Accounts receivable gross 25,327 1,246 533 918 28,024   26,152 1,102 465 711 28,430
Provision for doubtful accounts receivable (156) (3) (25) (491) (675)   (155) (30) (57) (490) (731)
Accounts receivable net 25,171 1,243 508 427 27,349   25,997 1,073 408 221 27,699

Refer to Note 4 for more information regarding the Volvo Group’s financial risks.
Refer to Note 15 for more information regarding credit risk in customer financing receivables.
Refer to Note 30 for information regarding goals and policies for financial instruments.