• According to http://www.karibuadventure.com/karibu-adventures-certificates/tin-number/ it is called "Taxpayer Identification Number" (sometimes "Tax payer identification Number"), or "TIN" for short.
• Sometimes called "TIN number".
• Sometimes "TIN namba" in swahili.
• https://www.tra.go.tz/index.php/starting-business/104-starting-business/438-tin-registration-desk confirms the naming.
• https://world.salestaxhandbook.com/tz-tanzania

  Businesses in Tanzania that are required to collect tax will be issued an identification number. Tax identification numbers can be verified with the Tanzania Revenue Authority, and will follow a certain format. The VAT number format is 00-111111-A.

  • This format example looks like for the VRN, rather than TIN, at least according to the examples at https://sepon.co.tz/
    • and https://www.wistasinn.co.tz/uploads/Wistas_Company_Profile_Final.pdf
    • and https://multiplexsystems.co.tz/index.php/media-center/downloads?download=10:multiplex-technology-ict-profile
    • and https://tadio.co.tz/www/en/stations/kahama-fm/
    • and http://gncsolutions.co.tz/corporate-social-responsibility/
• According to https://www.pwc.co.tz/assets/pdf/vat-alert-july-2018-requirments-reminder.pdf TIN and VAT Registration Number (VRN) are two different things.
• According to the forms linked in https://sra.co.tz/verification-of-taxpayers-records/ it looks like it is 9 positions long, separated in groups of three.
• According to the form at https://procedures.tic.go.tz/media/TIN%20form%202_1.pdf it is 9 positions long.

Could not find any specification on the structure/format, neither whether it has any check algorithm.

Note that there also exists a VAT Registration Number (VRN), so the TIN could not be used as such.

Examples:

• More than 700 examples at https://trade.tanzania.go.tz/media/LICENSED-CFA-SEPT.-2017-4%20pdf.pdf (attached here just in case).
• 69 examples at https://www.nemc.or.tz/uploads/publications/sw-1625824258-EXPERTS%20UPDATED%20COMPLETE%202020%20A-Z%20NAMES.pdf (attached here just in case). All copied here:

  129-042-877
  135-202-827
  115-575-503
  106-091-625
  120-723-987
  122-044-483
  104-746-047
  123-854-233
  100-101-297
  117-305-341
  107-075-259
  100-178-117
  107-966-013
  112-166-386
  122-034-178
  138-882-756
  117-409-171
  107-260-692
  100-197-898
  137-843-951
  107-199-101
  126-085-451
  135-769-827
  118-926-862
  115-692-127
  126-471-688
  112-351-035
  123-288-602
  121-786-524
  113-225-246
  138-007-286
  122-992-136
  101-041-662
  139-953-462
  109-345-180
  908-263-792
  111-588-198
  125-967-574
  107-588-582
  116-800-403
  101-299-570
  139-362-756
  131-057-857
  106-736-839
  101-151-425
  101-668-479
  104-368-867
  113-663-903
  121-666-944
  135-703-877
  132-761-728
  106-955-581
  130-882-110
  105-861-400
  140-564-044
  134-154-497
  115-236-776
  129-515-406
  119-343-100
  110-034-326
  119-264-251
  101-024-490
  107-538-844
  101-473-368
  104-979-386
  100-173-697
  106-535-590
  140-148-628
  111-039-240

• 121-207-079 from http://www.karibuadventure.com/karibu-adventures-certificates/tin-number/
• 117-030-407 from https://pro.or.tz/downloads/tin.php
• 130-393-985 from https://sportpesa.co.tz/
• 139 457 471 (also as 139-457-471 on attached images) from https://www.kisanjamasters.co.tz/about-us/company-profile/
• 135-000-205 from https://kibogate.co.tz/tin-certificate/
• 107-618-627 from https://juland.co.tz/sites/default/files/TRA2.pdf
• 124-753-783 from https://www.wezeshasasa.co.tz/info/Terms-and-Conditions
• 120-662-023 from http://peagas.co.tz/?page_id=1324
• 105-038-321 from http://isz.co.tz/wp-content/uploads/2021/04/Job-advert-2021-for-teachers.pdf
• 105-669-445 from https://www.radiowave.co.tz/images/about/RWCL_Statutory_Compliance_Documents_2019_opt.pdf
• 139-384-059 from https://www.jambotrips.co.tz/ru/page/about-us-jambo-trips-africa-tours
• 133-604-049 from http://www.kambasgroup.co.tz/wp-content/uploads/2021/11/certificate.pdf
• 142-303-175 from http://www.spectrums.co.tz/about_us.html
• 138-506-789 from https://gypsumplusmines.co.tz/
• 100-849-089 from https://kvdgroup.co.tz/about-us-4/
• 107-211-748 from http://www.barakaltd.co.tz/images/baraka_ltd_profile.pdf
• 141-076-841 from https://www.wecab.co.tz/about-us
• 115-793-217 from https://clusters.costech.or.tz/MFPCI?page=2
• 156-158-429 from https://www.mof.go.tz/uploads/text-editor/files/2.%20AGNESS%20SAMWEL%20NYAGALU_1666354244.pdf
• 100-168-375 from https://dse.co.tz/sites/default/files/PRECISION%20AIR%20PROSPECTUS%20September%202011.pdf
• 127-321-361 from https://bikosports.co.tz/liveall
• 121-899-779 from https://sepon.co.tz/
• 108-711-744 from https://www.wistasinn.co.tz/uploads/Wistas_Company_Profile_Final.pdf
• 130-376-134 from https://multiplexsystems.co.tz/index.php/media-center/downloads?download=10:multiplex-technology-ict-profile
• 136-449-125 from http://www.kandanda.co.tz/privacy-policy/
• 138-921-646 from https://www.safantatours.co.tz/Our-Company-Descriptions.php
• 102-158-008 from https://www.mof.go.tz/uploads/text-editor/files/59.%20KAMAKA%20-14,062,100_1666511334.pdf
• 127-975-116 from https://www.mof.go.tz/uploads/text-editor/files/53.%20GOODWILL%20-9,131,400_1666511163.pdf
• 110-496-907 from https://tadio.co.tz/www/en/stations/kahama-fm/
• 105-437-706 from https://endeleza.dse.co.tz/sites/default/files/2021-07/AKM-Draft%20Financial%20Statements%202018.pdf
• 101-325-695 from https://fullshangweblog.co.tz/2020/09/04/takukuru-manyara-yamfikisha-babu-joha-mahakamani-na-kusomewa-makosa-mawili/
• 100-784-661 from https://spil.co.tz/download/tra-tin-vat/
• 129-210-958 from http://www.jtsltd.co.tz/about_us.html
• 124-530-725 from http://www.moyomedia.co.tz/contact-us/
• 120-332-694 from http://kkiniconsulting.co.tz/wp-content/uploads/2018/05/KKCE-Profile.pdf
• 144 - 532 - 074 from https://www.pmo.go.tz/uploads/documents/sw-1662447467-Gazeti%202%20september%202022.pdf
• 101-345-467 from https://www.utumishi.go.tz/uploads/documents/sw-1656450886-29_OKTOBA__2021.pdf
• 111-169-268 from https://fanikiwa.co.tz/swa/sheria-na-masharti/
• 105-875-304 from http://weberms.co.tz/uploads/delivery/NOTE03TZ842040755201904111440.pdf
• https://www.mof.go.tz/uploads/text-editor/files/1.%20Plasco%20limited%20for%20supply%20of%20WATER%20PIPES_1658316256.pdf

  108-537-108
  100-147-181

• 128-755-586 from https://www.taneps.go.tz/epps/cft/listClarification.do?resourceId=14400344
• 100-145-804 from https://kigomaujijimc.go.tz/storage/app/media/uploaded-files/10-31-2022-07.49.44.pdf
• 102-072-286 from https://kaeso.or.tz/about-us
• 120-992-864 from https://www.stepsholdingsltd.co.tz/about
• 123-854-233 from https://colbaconsulting.co.tz/company-overview/
• 142-253-011 from https://nebconstruction.co.tz/
• 101-042-197 from https://zabuni.co.tz/storage/tenders/1553189916.pdf
• 101-195-651 from https://atc.ac.tz/mechanical/index.php/research-and-consultancy/atc-production-and-consultancy-bureau
• 130 307 337 from http://medox.co.tz/contact.php
• 138-360-679 from https://kimimba-swimming.co.tz/
• 130-084-273 from https://unitytechnologies.co.tz/about-us/
• 107-089-765 from https://urambodc.go.tz/storage/app/media/uploaded-files/vendor%20form-%20mfano%20Wazabuni.pdf
• 144-436-253 from https://www.sepcoauctioneering.co.tz/
• 130-265-529 from http://www.almubarak.ac.tz/schoolinformation.php
• 132760721 from http://www.blueskies.co.tz/about.html
• 135-972-118 from http://tanvic.co.tz/mist/index.php/about-us-layout2
• 105-632-991 from http://gncsolutions.co.tz/corporate-social-responsibility/
• 101-034-879 from http://shpi.or.tz/wp-content/uploads/2020/10/Audited-balance-and-Account-as-at-30thm-June-2017.pdf
• 112-911-847 from https://wajageneral.co.tz/wp-content/uploads/2022/02/Job-Vacancy-announcement-for-marketing-officers.pdf
• 100-195-232 from https://dse.co.tz/sites/default/files/Maendeleo%20Bank-Final%20prospectus%20as%20at%20August%202013.pdf
• 120-884-336 from https://www.thecitizen.co.tz/tanzania/news/national/fraudsters-target-investors-traders-2594430
• 110-170-335 from https://sentinelworks.co.tz/affiliates/
• 100-895-803 from https://legal.mcl.co.tz/public/uploads/dis/2022/07/fr13e3046da96529b71443cd8fcc181f066b3d58d1.pdf
• 129-506-202 from http://www.mwingapower.co.tz/profile.pdf
• 145-456-789 from https://zanhost.co.tz/
• 120-537-776 from https://biclimited.co.tz/
• 136-968-017 from https://www.powershield.co.tz/faq/
• 100-202-646 from https://www.nao.go.tz/uploads/Annual_General_Report_for_Development_Projects_2019_20.pdf
• 103150524 from https://www.pmo.go.tz/uploads/documents/sw-1649760880-GAZETI%2025%20MACHI%202022.pdf
• 117-953-300 from http://www.kasaha.co.tz/
• 125-181-317 from https://www.yetumfplc.co.tz/wp-content/uploads/2020/02/YETU-PROSPECTUS-ENGLISH-FULL-Editted-Final.pdf
• 134-267-437 from http://chuo.bslschools.co.tz/admission
• 125 319 890 from https://uresassociates.co.tz/legal_status_firme1b7.html
• 122-452-328 from http://kgginvestment.co.tz/contact-us/
• 118-847-407 from http://adlg.or.tz/about-us/
• 139 457 471 from https://www.kisanjamasters.co.tz/about-us/company-profile/
• https://www.mof.go.tz/uploads/text-editor/files/TEMEKE%20CONTRACTS%20NO.%2017-21_1661346171.pdf

  107-855-106
  116-738-023
  144-372-069
  100-146-630

• 139-384-059 from https://www.jambotrips.co.tz/page/about-us-jambo-trips-africa-tours
• 102-825-128 from https://www.wosac.co.tz/About_Us.html
• 113-521-937 from https://www.accenture.co.tz/contact-us/
• 128-263-454 from https://rmholdings.co.tz/
• 138-675-009 from https://ancassociates.co.tz/
• 120-364-529 from https://geniusworks.co.tz/downloads/SMS_Agreement.pdf
• 141-610-678 from https://easyworld.co.tz/
• 126 – 041 – 349 from https://derm.co.tz/elevators/registrations-and-legal-documents/
• 108-998-350 from http://zongii.co.tz/about-us/
• 115-577-239 from https://tadio.co.tz/www/en/mpanda-fm/
• 125-885-020 from https://hbksenterprises.co.tz/
• 132-800-723 from https://mjptl.co.tz/about/
• 110-402-910 from https://kgc.co.tz/about-us
• 110-496-907 from https://radiotadio.co.tz/kahamafm/page/13/
• 138-692-302 from https://mascons.co.tz/
• 103-626-137 from http://www.counsenuth.or.tz/wp-content/uploads/2019/07/Audit-Report-2015.pdf
• 153-443-971 from https://mayer.co.tz/contact/
• 111-927-480 from https://hematec.co.tz/wp-content/uploads/2017/11/Hematec-Certificate-.pdf
• 116-285-088 from https://www.mof.go.tz/uploads/text-editor/files/6.%20Nyumbigwa%20general%20supplies%20-%20PIPES%20AND%20WATER%20METER_1667825578.pdf
• 129-937-084 from https://ecohomes.co.tz/about-us/
• 142-002-078 from https://www.primelogix.co.tz/contact/
• 115-302-302 from http://sekagomaconsultancy.co.tz/home/index.php/2020/03/26/pellentesque-imperdiet/
• 127-491-690 from https://sundymerchants.co.tz/about-us
• 138-506-789 from https://gypsumplusmines.co.tz/
• 100-849-089 from https://kvdgroup.co.tz/about-us-4/
• 127- 532-931 from https://www.iact.co.tz/
• 103-410-444 from https://dse.co.tz/sites/default/files/dsefiles/TCCIA%20Investment%20PLC-%20Prospectus.pdf
• 101-346-943 from https://www.dart.go.tz/uploads/vacancies/en1538752393-Second%20%20.pdf
• 125-181-317 from https://www.yetumfplc.co.tz/wp-content/uploads/2015/06/Prospectus.pdf
• https://www.utumishi.go.tz/uploads/documents/sw-1662457205-19%20AGOSTI,%202022.pdf

  154-318-933
  139-793-412

• 100147181 from https://verify.tra.go.tz/Verify/Verified?Secret=12:04:04
• 130-210- 392 from https://ark.co.tz/wp-content/uploads/2018/05/Tax-Alert-No.-001-05-2018-WCF-Online-Self-Service-Portal.pdf
• 138-584-666 from https://www.utumishi.go.tz/uploads/documents/sw-1662454855-29%20JULAI,%202022.pdf
• 120-036-815 from https://www.tanzania.go.tz/uploads/documents/sw-1656436717-GAZETI%20LA%20TAREHE%2004.02.2022.pdf
• 105-437-706 from https://endeleza.dse.co.tz/sites/default/files/2021-07/AKM-Draft%20Financial%20Statements%202019.pdf
• 117-653-218 from http://www.delvetech.co.tz/wp-content/uploads/2017/06/Delve-Tech-Company-Profile_2017.pdf
• 131-946-961 from http://tra.or.tz/
• 118-690-265 from https://www.mof.go.tz/uploads/text-editor/files/65.TEXAS%20HARDWARE%20LTD_1667375153.pdf
• 120-992-864 from https://stepsholdingsltd.co.tz/
• 125-801-153 from https://www.utumishi.go.tz/uploads/documents/sw-1667899138-04%20NOVEMBA,%202022.pdf
• https://www.google.com/search?q=site:.tz+%22TIN+certificate%22&tbm=isch