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Administrative Expenses (Details) - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
General administrative expenses |  |  |  |
Information technology and communications |  | $ 92,264 | $ 79,300 | $ 69,933
Maintenance and repair of property and equipment |  | 50,297 | 36,716 | 35,044
External advisory services and professional services fees |  | 21,099 | 16,690 | 11,514
Surveillance and securities transport services |  | 11,533 | 11,828 | 11,927
Office supplies |  | 9,366 | 8,535 | 8,238
Insurance premiums |  | 5,851 | 5,286 | 5,797
Expenses for short-term leases and low value | [1] | 5,801 |  |
Energy, heating and other utilities |  | 5,697 | 5,676 | 5,674
External service of financial information |  | 5,461 | 4,787 | 4,510
Postal box, mail , postage and home delivery services |  | 5,131 | 6,045 | 5,343
Legal and notary expenses |  | 3,996 | 4,398 | 3,913
Representation and travel expenses |  | 3,657 | 3,763 | 4,040
External service of custody of documentation |  | 3,315 | 3,088 | 3,218
Other expenses of obligations for lease agreements | [1] | 2,797 |  |
Donations |  | 2,238 | 1,982 | 2,538
Office rental and equipment and ATM | [1] |  | 34,773 | 33,017
Other general administrative expenses |  | 5,227 | 8,591 | 6,905
Subtotal |  | 233,730 | 231,458 | 211,611
Outsource services |  |  |  |
Credit pre-evaluation |  | 19,159 | 21,952 | 19,577
Data processing |  | 10,129 | 8,562 | 12,330
External technological developments expenses |  | 9,459 | 9,984 | 10,418
Certification and technology testing |  | 7,460 | 6,823 | 6,532
Other |  | 3,470 | 3,577 | 3,092
Subtotal |  | 49,677 | 50,898 | 51,949
Board expenses |  |  |  |
Board of Directors Compensation |  | 2,509 | 2,511 | 2,505
Other Board expenses |  | 194 | 298 | 458
Subtotal |  | 2,703 | 2,809 | 2,955
Marketing expenses |  |  |  |
Advertising |  | 27,808 | 31,375 | 30,698
Subtotal |  | 27,808 | 31,375 | 30,698
Taxes, payroll taxes and contributions |  |  |  |
Contribution to the banking regulator |  | 10,285 | 9,548 | 9,176
Real estate contributions |  | 2,856 | 2,823 | 2,722
Patents |  | 1,209 | 1,243 | 1,241
Other taxes |  | 1,437 | 1,323 | 1,103
Subtotal |  | 15,787 | 14,937 | 14,242
Total |  | $ 329,705 | $ 331,477 | $ 311,455
[1] | See Note No. 4 Adoption of IFRS 16 "Leases".

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