Please send your data as .kicad_pcb or Gerber export (+drill file).
Prior always: KiCad DRC
Before you send us your data, please run the KiCad Design Rule Check (DRC). This avoids queries, thus saving you valuable time and can lead to the detection of errors in the layout.
When using KiCad's DRC, please select the option: "Refill all zones before performing DRC".
If you send us .kicad_pcb data, we will take care of generating the production data (Gerber export) for you with our standard settings.
Following KiCad’s official recommendation, we create the Gerber data with "refilled zones" . We therefore recommend that you select the option "Refill all zones before performing DRC" for the KiCad DRC (see above).
If you export the Gerber data (+ drill file) yourself, we recommend that you check the generated production data with KiCad's integrated Gerber viewer in addition to the KiCad DRC (see above). This allows you to check, e.g., whether you have exported all the necessary layers.
Our experience with numerous KiCad data sets of different program versions / different users teaches us: It is more crucial to run the DRC of KiCad than the question in which file format you send us your layout.