# Detect tampered and deepfake Deputation / Assignment Letter > A deputation letter is the basis on which an intra-company transfer visa is granted, and the field with the strongest pull on it is the assignment period, because the dates written there set the length of stay an officer approves. The letter also has to show that the employee stays on the sending company's rolls, that a named host entity has asked for them, and that they come back at the end. Each of those is a sentence somebody can rewrite. **Canonical URL:** https://tampercheck.ai/documents-support/deputation_letter **API document class:** `deputation_letter` --- ## What a genuine deputation letter contains A deputation or secondment letter is issued by the sending company on its letterhead, with a reference number and a date. It names the employee, their designation and employee ID, then the host entity: legal name, address, country, and its relationship to the sender as a subsidiary, branch or group company. It states the purpose of the assignment in concrete terms, the start and end dates with the total duration, who bears salary and living expenses during the posting, and a guarantee that employment continues and the employee returns. An authorised signatory and the company seal close it. Duration is the constraint everything else is measured against. Start and end dates have to add up to the total the letter states, and that total has to fit the visa category applied for, since each category caps the stay it permits. Where the sending company keeps paying the salary, payslips have to run through the assignment period unbroken. The host entity has to be a real, related company, and the purpose written here has to match the invitation letter the host provides. ## How deputation letter forgeries are made ### Assignment period extended End dates are pushed out, or the total duration restated, so the visa granted runs longer than the posting the employer authorised. This is the highest-value edit on the document, and it usually leaves the start date, the end date and the duration sentence disagreeing with one another by days. ### Host entity substituted The receiving company is replaced with one in a country offering a longer or easier permission, or with a group name that sounds related but is not. A substituted name is often the wrong length for the space it occupies, and the address block beneath it does not always get updated to match. ### Purpose rewritten to fit a visa category Training becomes project delivery, or the reverse, because the category an officer assesses the application under depends on what the employee will actually be doing abroad. A rewritten purpose paragraph runs at slightly different spacing than the text it displaced, and it tends to contradict the host's own invitation. ### Salary responsibility clause altered The line stating who pays is changed so the employee appears to remain on the sending company's payroll throughout, which is what most transfer categories require. The claim is then contradicted by payslips that stop partway, or by a host-country contract sitting in the same application. ### A deputation between two companies that barely exist Sender and host are both shells, or the relationship between them is asserted and never documented, and the letter is manufactured along with them. There is no original to detect an edit against, so the analysis looks at letterhead production, seal placement, and whether the same template turns up under other company names. ### Seal and signature reproduced A company seal and an authorised signature are copied off a genuine internal letter and placed onto the deputation letter. A copied seal has edges too clean for a rubber stamp, and a signature matching another document exactly did not come out of a pen twice. ## What TamperCheck checks on a deputation letter TamperCheck runs 200+ forensic checks across three layers and returns a risk score from 0 to 100 with plain-English findings tied to specific regions of the document. These three carry the most weight on this document class. ### Arithmetic reconciliation Stated totals are recomputed from their components, and running or cumulative figures are checked for continuity across periods. A single edited value breaks the chain even when the page still looks right. ### Letterhead, logo, and issuer plausibility Issuer branding is checked for resolution and compression consistency against the body text it sits on. A logo lifted from a website carries the signature of its source, not of the document. ### Date and validity consistency Issue, expiry, and period dates are checked against one another and against the file's own creation metadata, which catches backdating and validity extension. ### And many more checks The three above are the layers that carry the most weight on a deputation letter. Every upload runs the full suite of 200+ checks regardless of document class, spanning file structure and metadata, pixel-level forensics, font and text rendering, optical and print characteristics, provenance signals, AI-generation signatures, and many more checks. ## Who verifies a deputation letter, and why Consulates assessing intra-company transfer and short-term work visa applications. In each case the document is being used to unlock money, access, or a legal status, which is exactly what makes it worth forging. ## How to verify a deputation letter in 4 steps 1. **Check the fields against each other.** Read assignment dates, host company name, and purpose of assignment together rather than one at a time. Forgers typically change one value and leave the rest of the document describing the original. 2. **Inspect the file metadata.** Open the document properties and look at the producer, creation date, and modification date. A document produced by a consumer PDF editor, or created long after the date printed on its face, is worth a closer look. 3. **Ask for a second document.** Request a corroborating document from the same issuer or an adjacent period. Forgery effort concentrates on one file, so inconsistencies surface as soon as there are two to compare. 4. **Run a forensic check.** Manual review catches obvious edits but not field-level pixel manipulation or synthetic generation. TamperCheck runs 200+ forensic checks on a deputation letter and returns a risk score from 0 to 100 in about a minute, at $0.50 per document. ## Frequently asked questions ### How do consulates verify a deputation letter? Consulates verify it by cross-reading it against the host entity's invitation letter, the corporate relationship between the two companies, and the applicant's payslips, then by contacting the sending company's HR through details they establish themselves. Assignment dates, purpose and salary responsibility have to match across all of those, and a mismatch between the letter and the invitation usually triggers a request for further evidence. ### Can an overseas assignment letter be faked? Yes, and the usual fake is not an invented letter but a genuine one with the assignment period extended, since those dates decide how long the visa runs. Letters are also produced by companies with no real operation at either end of the transfer. Because the corporate relationship is asserted on the letter rather than proven by it, the document carries more weight than it can support. ### What does a deputation letter need to say for a visa? It needs to state the host entity and its relationship to the employer, the concrete purpose of the assignment, exact start and end dates with the total duration, who pays the employee during the posting, and an explicit commitment that employment continues and the employee returns. Missing any one of those invites a refusal, most often the return commitment, which is what the officer is really weighing. ### What is the difference between a deputation letter and an NOC? A deputation letter assigns someone to work somewhere specific for a stated period, while a no objection certificate simply records that an organisation does not object to something the person wants to do. One creates an obligation on two companies, the other removes a barrier. An intra-company transfer application needs the first, and some consulates ask for the second alongside it. ## Related document types - Experience Letter: https://tampercheck.ai/documents-support/experience_letter - Relieving Letter: https://tampercheck.ai/documents-support/relieving_letter - Resignation Letter: https://tampercheck.ai/documents-support/resignation_letter - Termination Letter: https://tampercheck.ai/documents-support/termination_letter - Reference Letter: https://tampercheck.ai/documents-support/reference_letter - Cover Letter: https://tampercheck.ai/documents-support/cover_letter --- Try TamperCheck now: https://tampercheck.ai/dashboard · Docs: https://tampercheck.ai/docs · Pricing: https://tampercheck.ai/pricing