Hayati Ali Keleş
Co-founder and CTO
Co-founder and technology lead at Seferi; the person who signs the regulatory and operations articles on the blog.
Co-founder and CTO of Seferi. Responsible for the product's technical architecture and for turning the road freight operation — the line running from an incoming email to an issued invoice — into working software.
Seferi is one of the products built within Sirius AI Tech. It lets road freight carriers run quoting, trips, documents and invoicing in one place.
He signs the regulatory and accounting articles on the blog. Content published on U-ETDS declarations, transport waybills, VAT withholding on freight invoices and freight rate calculation goes through his review.
Articles he signs
Regulatory statements are grounded in official sources and every article lists its references. Because amounts and thresholds change annually, the articles give no figures and point readers to the competent authority instead.
- How to File a U-ETDS Freight Declaration, Step by StepThe declaration has to be filed before the carriage starts, and the Ministry allows a web service to send it so nobody has to open the e-Devlet portal.
- How Much Is the U-ETDS Penalty? Warning Points [2026]The sanction is not a flat fine but a warning point balance sitting on your authorisation certificate, and a clean three-month period removes part of it.
- U-ETDS Record Rejected: Causes and How to Fix ItIf the system rejects the record, the trip was never declared — and a carrier that never reads the response only finds out at an inspection.
- Transport Waybill vs Dispatch Note in TürkiyeThe dispatch note is issued by the seller or the collecting buyer and the transport waybill by whoever carries the goods for a fee, so a paid load travels with both.
- Transport Waybill Penalty in Türkiye [2026]The penalty falls on whoever carries the goods for a fee, not the seller, and your customer's dispatch note does not close your own obligation.
- How to Issue a Freight Invoice: Step by Step [2026]An invoice never arises on its own: get the quote, the trip and the transport waybill right, and the invoice comes out right.
- Freight VAT Withholding (Tevkifat) Rate and Limit 2026In freight transport the rate is 2/10, and the limit is checked on the VAT-inclusive total rather than the service fee.
- How Is Road Freight Rate (Navlun) Calculated? [2026]What breaks a freight rate is not the formula but the items that never reach the quote: the empty return leg and the tolls along the route.
- Where Does Excel Break Down in Trip Tracking?Excel is the right tool at small scale; the problem is never the file itself, but what happens once more than one person writes into it.
- Adding a Vehicle to a K Authorisation CertificateAdding a vehicle is not a filing step: the plate's notification duty, its waybill and its standing in a roadside inspection all change with it.
- How to Prepare a Freight Quote Using AI [2026]What AI does in a freight quote is not setting the price but turning a free-text enquiry into a structured trip request.
- How Does AI Route Optimisation Work in Road Freight?The shortest way is often the most expensive one, because route optimisation is a balance struck between distance, tolls, driving time and the delivery window.