Your qualified seal, not ours.

A qualified electronic seal under eIDAS comes from a qualified trust service provider and a qualified signature creation device. Passport Studio does not sell that seal and does not apply it for you. Operators in the Netherlands and Belgium commonly look at Digidentity (remote), KPN, or GlobalSign. Published list prices are often in the range of €300 to €1,200 a year; confirm the current price with the provider. The organisation name and identifiers in the passport have to match the certificate. A .p12 file uploaded here is rejected. A later connection can use the customer's own service-account key (private_key_jwt). The advanced signature this app can make today is not a qualified eIDAS seal.