Check a Verifactu record chain — A Spanish billing system chains every invoice record to the previous one with a SHA-256 hash: delete or alter one in the middle and every later record stops adding up. That is the mechanism — what does not exist is an easy way to CHECK it on a file someone handed you. An accountant who receives an export from a client system has no way of knowing the chain is intact before the tax inspector arrives. Two checks kept apart on purpose: the chaining is certain, the hash depends on how the field order is read. No AI, nothing stored, and we are not a billing system. AIM PAPYR processes your document only for this operation: nothing is stored after the response, and sensitive data is encrypted before it ever reaches an AI model.
Yes. Every classic tool is free, ad-free and requires no account. AI features include a free daily allowance.
AIM PAPYR processes your document only for this operation: nothing is stored after the response, and sensitive data is encrypted before it ever reaches an AI model.
Up to 5,000 pages per operation and whatever size your plan allows. For anything bigger, split it first and work in parts.