Identifying the document type is one of the first steps to begin document processing. Users can specify the document type by populating the document_type field with one of the document types listed below when uploading or updating a document. Sikoia also automatically classifies the uploaded file/document and populates the sikoia_document_type field too.

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Document type comparison check
Many customers compare the document_type and the sikoia_document_type to request an automatic resubmission when the two disagree.

Sikoia leverages advanced ML/AI deep-learning models that combine layout and language features to accurately detect and identify documents.

Document file splitting

During classification, Sikoia also detects whether a single file contains more than one document. When it does, the file is split so that each document can be handled on its own: every individual document identified within the file is assigned its own data_source_id, distinct from the file-level document_id/source_id. This split is what allows each document to be classified, validated, and extracted independently, and it's the same data_source_id referenced throughout the document lifecycle.

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Multiple Documents in a Single File
Currently our platform supports input files containing multiple documents of the same document type within a single file.

Each document is detected and processed individually, then mapped into a separate internal structure called a 'data source' to ensure accurate and organised data handling. Data sources are utilized for features such as Income & Employer Verification, Affordability Insights, and Completeness Checks. Learn more about data sources here

Learn more about data sourceshere.

Document Types

The currently supported document types are:

Document type	Description	Standard extraction	Deep extraction
BankStatement	Detailed report of transactions and balances in a bank account.	✅	✅
BenefitAwardLetter	Letter from government agency confirming eligibility for social welfare benefits.	✅
ChildBenefitLetter	Letter issued from the Child Benefit Office.	✅
CompanyRegistration	Official record confirming a company's legal existence.	✅
Contract	Any form of contractual agreement.	✅
CreditReport	Document summarising the credit history of an individual or business.	✅
EmploymentContract	Agreement setting out employment conditions, rights and responsibilities.	✅
EmploymentLetter	Letter from an employer stating employment details.	✅
FactFind	Document summarising essential information about an individual or business.	✅
FinancialAccounts	Document showing profit and loss, balance sheet, and cash flow statements for an entity.	✅
Identity	Government issued card or record to verify an individual's identity.	✅
P45	HMRC form filled by the employer when an employee stops working.	✅
P60	End-of-year certificate from HMRC.	✅
Payslip	Document issued by an employer showing salary details.	✅	✅
PensionStatement	Pension plan statement detailing the amount in a pension pot	✅
SA302	Detailed income and tax calculation summary, either generated via HMRC or submitted by the individual.	✅	✅
SavingsStatement	Bank statement on savings, ISA, and other accounts.	✅	✅
StakeholdersDisclosure	Official record about entities holding an interest in a business or project.	✅
StudentLoanLetter	Letter from a lender specifying details of a student loan.	✅
Tax	Any other document issued by tax authorities.	✅
TaxOverview	Less detailed tax calculation summary from HMRC.	✅	✅
UtilityBill	Statement detailing charges for essential services (e.g. electricity, water, gas).	✅
Other	Any other document that doesn’t fit the types above.	✅