| | December 31, 2017 | | | December 31, 2016 | | ||
Accounts receivable for goods and services sales in Non-financial sector companies | | Ps. | 1,070,936 | | | Ps. | 1,066,628 | |
Financial assets in concession contract at amortized cost ( See note 16) | | | 786,018 | | | | 203,241 | |
Credit card compensations and network compensation | | | 426,090 | | | | 249,430 | |
Fees, services and advances | | | 258,850 | | | | 272,488 | |
Dormant customer deposits ICETEX (1) | | | 256,806 | | | | 237,034 | |
Payment in advance | | | 228,765 | | | | 262,473 | |
Debtors | | | 224,340 | | | | 178,785 | |
Commissions | | | 186,646 | | | | 131,867 | |
Transfers in process | | | 185,634 | | | | 166,153 | |
Deposits | | | 142,168 | | | | 138,520 | |
Payment in advance to supplier's contract | | | 117,858 | | | | 39,309 | |
Holding and parent establishment | | | 114,513 | | | | 230,950 | |
Transfers to the National Treasury | | | 58,042 | | | | 52,351 | |
Storage services | | | 43,767 | | | | 41,282 | |
Quota shares retirement pensions | | | 28,485 | | | | 30,396 | |
Claims to insurance companies | | | 14,450 | | | | 19,201 | |
Dividends | | | 3,561 | | | | 16,263 | |
Deductible taxes | | | 11,961 | | | | 15,611 | |
Promissory sellers | | | 15,144 | | | | 11,661 | |
Payment in advance for industry and trade taxes | | | 13,392 | | | | 11,553 | |
Others | | | 278,708 | | | | 344,476 | |
Gross balance of other accounts receivable | | | 4,466,134 | | | | 3,719,672 | |
Impairment allowance | | | (226,862 | ) | | | (195,078 | ) |
Other accounts receivable, net | | Ps. | 4,239,272 | | | Ps. | 3,524,594 | |
| | December 31, 2017 | | | December 31, 2016 | | | December 31, 2015 | | |||
Balance at the beginning of the year | | Ps. | 195,078 | | | Ps. | 194,450 | | | Ps. | 222,385 | |
Provision charged to profit or loss | | | 98,024 | | | | 105,942 | | | | 96,775 | |
Recovery for partial payments from the clients | | | (18,383 | ) | | | (32,514 | ) | | | (40,185 | ) |
Charge-offs | | | (48,171 | ) | | | (72,120 | ) | | | (85,880 | ) |
Exchange gains (losses) in foreign currency | | | 314 | | | | (680 | ) | | | 1,355 | |
Balance at the end of the year | | Ps. | 226,862 | | | Ps. | 195,078 | | | Ps. | 194,450 | |