The first page of the document DocMake makes from the sample values on this page.
Sales
Warranty Certificate
A warranty certificate is a promise with a start date, an end date and a serial number on it. It says which units are covered, for how long, against what, and what the holder has to do to keep the cover alive. Most of the value sits in the schedule rather than the paragraphs, because a certificate that names a model but not a serial cannot be matched to the unit standing in the plant room three years later.
The three dates are not the same date and mixing them up causes most warranty arguments. Manufacture, delivery and commissioning can be months apart, and a certificate that runs from delivery leaves an installer carrying the gap while equipment sits in a store. Recording the date of manufacture and the date each unit went into service, and stating which one the period runs from, settles the question before it becomes a dispute. Where units go into service in stages, as they do on a building handed over floor by floor, each unit ends up with its own end date and the schedule is the only place that record exists.
Cover and exclusions belong side by side, in the same plain wording. Parts, labour, travel, consumables, wear items and consequential loss are treated differently by almost every warranty, and a document that lists what is covered but hides the exclusions in a paragraph of small text is the one that gets read out in a complaint. The conditions matter just as much: servicing at the stated interval by a competent person, correct water treatment or power supply, records kept, and modifications approved. For consumer sales in the European Union a commercial guarantee like this sits on top of the buyer's statutory rights, which include a minimum two year liability for goods that do not conform, and it cannot cut those rights down. Between businesses the certificate is usually the whole of the promise, so the wording carries more weight.
This is the document class that most rewards generation from data. A manufacturer issues one for every unit that ships and an installer issues one for every project handed over, each with different serials, dates and durations, and the text between them barely changes. Holding one template and rendering it from the shipment or handover record produces a correct, individually serialised certificate per unit or per batch, which is exactly the work that stops being possible by hand at any real volume.
Blanks to fill
| certificate_number | Certificate number |
| issue_date | Issue date |
| issuer_name | Issued by |
| issuer_address | Issuer address |
| issuer_company_number | Company number |
| beneficiary_name | Issued to |
| beneficiary_address | Beneficiary address |
| installer_name | Installed by |
| project_name | Project |
| installation_address | Installation address |
| order_reference | Order reference |
| delivery_reference | Delivery reference |
| handover_reference | Handover reference |
| warranty_contact | Warranty contact |
| warranty_period | Warranty period |
| period_runs_from | When the cover starts |
| extended_cover_note | Cover that runs longer |
| response_commitment | What we promise |
| claim_procedure | How to claim |
| evidence_required | What to have ready |
| claim_contact | Claims contact |
| remedy | What we will do |
| parts_replaced_note | Parts we replace |
| transfer_conditions | Passing the cover on |
| statutory_rights_note | Rights in law |
| liability_limit | What we owe at most |
| governing_law | Governing law |
| authorised_signatory | Signed by |
| signatory_role | Role |
| verification_note | Checking this certificate |
| equipment[] | One per item, so a row is added for every item in the list |
| cover[] | One per item, so a row is added for every item in the list |
| exclusions[] | One per item, so a row is added for every item in the list |
| conditions[] | One per item, so a row is added for every item in the list |
The data behind the preview
This is the exact JSON that produced the document above. Change the values, POST them to the API, and you get your version back as DOCX or PDF. Lists grow and shrink with your data; the layout adapts.
- 01 Sign up free and duplicate this template into your workspace.
- 02 Adjust the wording and branding in the visual editor.
- 03 Fill it in the app, share it as a form link, or call the API.
sample-data.json
{
"certificate_number": "WC-2026-0442",
"issue_date": "October 2, 2026",
"issuer_name": "Brackenhill Air Systems Ltd",
"issuer_address": "Fenway Works, Colne Road, Peterborough PE2 8QA",
"issuer_company_number": "07331486",
"warranty_contact": "warranty@brackenhillair.example, quoting this certificate and the unit serial",
"beneficiary_name": "Cascade Street Holdings LLC",
"beneficiary_address": "Cascade Street, Bristol BS1 6TR",
"installer_name": "Marsden Mechanical Ltd, an approved installer for the BH-4200 range",
"project_name": "Cascade Street offices, completion 1, levels 3 and 4",
"installation_address": "Level 4 plant room, Cascade Street, Bristol BS1 6TR",
"order_reference": "PO-2026-1187, placed March 3, 2026",
"delivery_reference": "Delivery notes DN-88412 and DN-88537",
"handover_reference": "Handover certificate HC-2026-0031 of October 2, 2026",
"warranty_period": "Twenty four months on parts and labour, and sixty months on the heat recovery wheel and its drive.",
"period_runs_from": "The day each unit was commissioned, not the day it was delivered. Where a unit is commissioned more than six months after delivery, cover runs from six months after delivery.",
"extended_cover_note": "The sixty month cover on the heat recovery wheel and drive is parts only after month twenty four. Labour and travel from month twenty five are charged at the rates of the day unless a service agreement is in place.",
"equipment": [
{
"asset_tag": "AHU-01",
"equipment": "Air handling unit with heat recovery, level 3 north",
"model": "BH-4200-HR",
"serial_number": "BH42-26-0116",
"made": "May 2026",
"in_service": "September 26, 2026",
"cover_starts": "September 26, 2026",
"cover_ends": "September 26, 2028"
},
{
"asset_tag": "AHU-02",
"equipment": "Air handling unit with heat recovery, level 3 south",
"model": "BH-4200-HR",
"serial_number": "BH42-26-0117",
"made": "May 2026",
"in_service": "September 26, 2026",
"cover_starts": "September 26, 2026",
"cover_ends": "September 26, 2028"
},
{
"asset_tag": "AHU-03",
"equipment": "Air handling unit with heat recovery, level 3 office",
"model": "BH-4200-HR",
"serial_number": "BH42-26-0118",
"made": "June 2026",
"in_service": "October 2, 2026",
"cover_starts": "October 2, 2026",
"cover_ends": "October 2, 2028"
},
{
"asset_tag": "AHU-04",
"equipment": "Air handling unit with heat recovery, level 4 office",
"model": "BH-4200-HR",
"serial_number": "BH42-26-0121",
"made": "June 2026",
"in_service": "October 2, 2026",
"cover_starts": "October 2, 2026",
"cover_ends": "October 2, 2028"
},
{
"asset_tag": "FCU-L4-01",
"equipment": "Fan coil unit, level 4 meeting rooms",
"model": "BH-FC-600",
"serial_number": "BHFC-26-4471",
"made": "July 2026",
"in_service": "October 2, 2026",
"cover_starts": "October 2, 2026",
"cover_ends": "October 2, 2028"
},
{
"asset_tag": "FCU-L4-02",
"equipment": "Fan coil unit, level 4 meeting rooms",
"model": "BH-FC-600",
"serial_number": "BHFC-26-4472",
"made": "July 2026",
"in_service": "October 2, 2026",
"cover_starts": "October 2, 2026",
"cover_ends": "October 2, 2028"
}
],
"cover": [
{
"covered": "Replacement parts",
"detail": "Any part that fails through a fault in the materials or the making of it, supplied free for the period stated against that part."
},
{
"covered": "Labour",
"detail": "Finding the fault and fitting the part, by us or by an approved installer, in the first twenty four months, in normal working hours."
},
{
"covered": "Travel",
"detail": "Travel to sites inside the mainland service area in the first twenty four months."
},
{
"covered": "Control board and sensors",
"detail": "The control board, the sensors and the wiring fitted at the works, twenty four months."
},
{
"covered": "Heat recovery wheel and drive",
"detail": "Sixty months on parts: the wheel, the bearings, the belt and the drive motor."
},
{
"covered": "Casing and frame",
"detail": "Sixty months against the casing rusting through from the inside of the unit."
}
],
"exclusions": [
{
"not_covered": "Parts that wear out",
"detail": "Filters, belts outside the heat recovery drive, gaskets, lamps and fuses."
},
{
"not_covered": "Damage from site conditions",
"detail": "Water from a blocked or badly fitted condensate line, building dust where the unit was run without filters, and frost where the unit was left unprotected."
},
{
"not_covered": "Wrong supply",
"detail": "Failures caused by a supply outside the range on the rating plate, phase imbalance, or the wrong water quality in the coil circuit."
},
{
"not_covered": "Work by anybody else",
"detail": "Any failure after a repair, a change or a move by somebody who is not us or an approved installer."
},
{
"not_covered": "Loss that follows",
"detail": "Loss of use, loss of profit, spoiled stock, hire of temporary plant and any other loss that follows from the fault."
},
{
"not_covered": "Marks and finish",
"detail": "Scratches, dents and paint finish reported more than fourteen days after delivery."
}
],
"conditions": [
{
"condition": "Servicing",
"detail": "Serviced at the intervals in the manual, at least twice a year for this range, by a competent person, with dated records kept."
},
{
"condition": "Commissioning",
"detail": "Commissioned by an approved installer, with the commissioning record sent back to us inside thirty days."
},
{
"condition": "Water quality",
"detail": "Coil circuit water treated to the specification in the manual, with sample results available if we ask."
},
{
"condition": "Filters",
"detail": "The filter grades in the manual used, and changed when the pressure across them reaches the stated limit."
},
{
"condition": "Records",
"detail": "Service records, fault logs and any part fitted written against the serial number of the unit."
},
{
"condition": "Telling us",
"detail": "Faults reported inside seven days of being noticed, and the unit not run on after a fault that could do more damage."
}
],
"response_commitment": "Diagnosis by telephone the same working day for a call before 15:00. An engineer attends inside two working days for a unit that has stopped, and inside five for a fault that leaves it running. Parts on the mainland stock list are sent the next working day.",
"claim_procedure": "Call the warranty desk with this certificate number and the serial number of the unit. The desk opens a case reference, arranges diagnosis by telephone, and sends us or the approved installer where somebody has to attend. Work done without a case reference is not covered, even where the fault would have been.",
"claim_contact": "Brackenhill warranty desk, warranty@brackenhillair.example, 01733 555 018, 08:00 to 17:00 Monday to Friday",
"evidence_required": "The serial number, this certificate number, the commissioning record, the service records since commissioning, and what the fault looks like with any code shown on the controller.",
"remedy": "We repair or replace the faulty part, whichever we judge right, or replace the unit where a repair is not practical. A replacement is an equivalent current model where the original is no longer made.",
"parts_replaced_note": "A part we replace under this warranty becomes ours and is returned if we ask. The new part carries whatever is left of the original cover, or ninety days, whichever is longer.",
"transfer_conditions": "Cover passes with the building to a new owner or tenant for the time left, as long as the warranty desk is told inside thirty days of the transfer and the service records go with it. There is no fee. Cover does not pass if a unit is taken out and refitted at another address.",
"statutory_rights_note": "This warranty is given on top of the rights the buyer has in law and takes nothing away from them. Business buyers should read this certificate together with the terms of sale.",
"liability_limit": "What we owe under this warranty is the repair or the replacement described above and no more than the price paid for the unit concerned. Nothing here limits what we owe for death or injury caused by our negligence, or for fraud.",
"governing_law": "the laws of England and Wales",
"authorised_signatory": "Ruth Calloway",
"signatory_role": "Aftersales Director",
"verification_note": "The warranty desk confirms this certificate against the certificate number and any serial number on it. A certificate is issued per project and a unit appears on one certificate only."
}Generate this document via the API
One template plus changing data is the whole point. The list of blanks above is the contract, and every new set of values comes back in the same layout: fill it in the app, hand someone a form link, or POST the JSON and get the file straight back.
The request below carries this page's own values, so it runs as soon as the template exists in your workspace. Swap the values for yours and the response is your document.
make-warranty-certificate.sh
curl -X POST https://app.docmake.io/api/v1/render \
-H "Authorization: Bearer $DOCMAKE_API_KEY" \
-H "Content-Type: application/json" \
-H "Accept: application/json" \
--output warranty-certificate.pdf \
--data-binary @- <<'JSON'
{
"template_id": "tmpl_your_template_id",
"format": "pdf",
"data": {
"certificate_number": "WC-2026-0442",
"issue_date": "October 2, 2026",
"issuer_name": "Brackenhill Air Systems Ltd",
"issuer_address": "Fenway Works, Colne Road, Peterborough PE2 8QA",
"issuer_company_number": "07331486",
"warranty_contact": "warranty@brackenhillair.example, quoting this certificate and the unit serial",
"beneficiary_name": "Cascade Street Holdings LLC",
"beneficiary_address": "Cascade Street, Bristol BS1 6TR",
"installer_name": "Marsden Mechanical Ltd, an approved installer for the BH-4200 range",
"project_name": "Cascade Street offices, completion 1, levels 3 and 4",
"installation_address": "Level 4 plant room, Cascade Street, Bristol BS1 6TR",
"order_reference": "PO-2026-1187, placed March 3, 2026",
"delivery_reference": "Delivery notes DN-88412 and DN-88537",
"handover_reference": "Handover certificate HC-2026-0031 of October 2, 2026",
"warranty_period": "Twenty four months on parts and labour, and sixty months on the heat recovery wheel and its drive.",
"period_runs_from": "The day each unit was commissioned, not the day it was delivered. Where a unit is commissioned more than six months after delivery, cover runs from six months after delivery.",
"extended_cover_note": "The sixty month cover on the heat recovery wheel and drive is parts only after month twenty four. Labour and travel from month twenty five are charged at the rates of the day unless a service agreement is in place.",
"equipment": [
{
"asset_tag": "AHU-01",
"equipment": "Air handling unit with heat recovery, level 3 north",
"model": "BH-4200-HR",
"serial_number": "BH42-26-0116",
"made": "May 2026",
"in_service": "September 26, 2026",
"cover_starts": "September 26, 2026",
"cover_ends": "September 26, 2028"
},
{
"asset_tag": "AHU-02",
"equipment": "Air handling unit with heat recovery, level 3 south",
"model": "BH-4200-HR",
"serial_number": "BH42-26-0117",
"made": "May 2026",
"in_service": "September 26, 2026",
"cover_starts": "September 26, 2026",
"cover_ends": "September 26, 2028"
},
{
"asset_tag": "AHU-03",
"equipment": "Air handling unit with heat recovery, level 3 office",
"model": "BH-4200-HR",
"serial_number": "BH42-26-0118",
"made": "June 2026",
"in_service": "October 2, 2026",
"cover_starts": "October 2, 2026",
"cover_ends": "October 2, 2028"
},
{
"asset_tag": "AHU-04",
"equipment": "Air handling unit with heat recovery, level 4 office",
"model": "BH-4200-HR",
"serial_number": "BH42-26-0121",
"made": "June 2026",
"in_service": "October 2, 2026",
"cover_starts": "October 2, 2026",
"cover_ends": "October 2, 2028"
},
{
"asset_tag": "FCU-L4-01",
"equipment": "Fan coil unit, level 4 meeting rooms",
"model": "BH-FC-600",
"serial_number": "BHFC-26-4471",
"made": "July 2026",
"in_service": "October 2, 2026",
"cover_starts": "October 2, 2026",
"cover_ends": "October 2, 2028"
},
{
"asset_tag": "FCU-L4-02",
"equipment": "Fan coil unit, level 4 meeting rooms",
"model": "BH-FC-600",
"serial_number": "BHFC-26-4472",
"made": "July 2026",
"in_service": "October 2, 2026",
"cover_starts": "October 2, 2026",
"cover_ends": "October 2, 2028"
}
],
"cover": [
{
"covered": "Replacement parts",
"detail": "Any part that fails through a fault in the materials or the making of it, supplied free for the period stated against that part."
},
{
"covered": "Labour",
"detail": "Finding the fault and fitting the part, by us or by an approved installer, in the first twenty four months, in normal working hours."
},
{
"covered": "Travel",
"detail": "Travel to sites inside the mainland service area in the first twenty four months."
},
{
"covered": "Control board and sensors",
"detail": "The control board, the sensors and the wiring fitted at the works, twenty four months."
},
{
"covered": "Heat recovery wheel and drive",
"detail": "Sixty months on parts: the wheel, the bearings, the belt and the drive motor."
},
{
"covered": "Casing and frame",
"detail": "Sixty months against the casing rusting through from the inside of the unit."
}
],
"exclusions": [
{
"not_covered": "Parts that wear out",
"detail": "Filters, belts outside the heat recovery drive, gaskets, lamps and fuses."
},
{
"not_covered": "Damage from site conditions",
"detail": "Water from a blocked or badly fitted condensate line, building dust where the unit was run without filters, and frost where the unit was left unprotected."
},
{
"not_covered": "Wrong supply",
"detail": "Failures caused by a supply outside the range on the rating plate, phase imbalance, or the wrong water quality in the coil circuit."
},
{
"not_covered": "Work by anybody else",
"detail": "Any failure after a repair, a change or a move by somebody who is not us or an approved installer."
},
{
"not_covered": "Loss that follows",
"detail": "Loss of use, loss of profit, spoiled stock, hire of temporary plant and any other loss that follows from the fault."
},
{
"not_covered": "Marks and finish",
"detail": "Scratches, dents and paint finish reported more than fourteen days after delivery."
}
],
"conditions": [
{
"condition": "Servicing",
"detail": "Serviced at the intervals in the manual, at least twice a year for this range, by a competent person, with dated records kept."
},
{
"condition": "Commissioning",
"detail": "Commissioned by an approved installer, with the commissioning record sent back to us inside thirty days."
},
{
"condition": "Water quality",
"detail": "Coil circuit water treated to the specification in the manual, with sample results available if we ask."
},
{
"condition": "Filters",
"detail": "The filter grades in the manual used, and changed when the pressure across them reaches the stated limit."
},
{
"condition": "Records",
"detail": "Service records, fault logs and any part fitted written against the serial number of the unit."
},
{
"condition": "Telling us",
"detail": "Faults reported inside seven days of being noticed, and the unit not run on after a fault that could do more damage."
}
],
"response_commitment": "Diagnosis by telephone the same working day for a call before 15:00. An engineer attends inside two working days for a unit that has stopped, and inside five for a fault that leaves it running. Parts on the mainland stock list are sent the next working day.",
"claim_procedure": "Call the warranty desk with this certificate number and the serial number of the unit. The desk opens a case reference, arranges diagnosis by telephone, and sends us or the approved installer where somebody has to attend. Work done without a case reference is not covered, even where the fault would have been.",
"claim_contact": "Brackenhill warranty desk, warranty@brackenhillair.example, 01733 555 018, 08:00 to 17:00 Monday to Friday",
"evidence_required": "The serial number, this certificate number, the commissioning record, the service records since commissioning, and what the fault looks like with any code shown on the controller.",
"remedy": "We repair or replace the faulty part, whichever we judge right, or replace the unit where a repair is not practical. A replacement is an equivalent current model where the original is no longer made.",
"parts_replaced_note": "A part we replace under this warranty becomes ours and is returned if we ask. The new part carries whatever is left of the original cover, or ninety days, whichever is longer.",
"transfer_conditions": "Cover passes with the building to a new owner or tenant for the time left, as long as the warranty desk is told inside thirty days of the transfer and the service records go with it. There is no fee. Cover does not pass if a unit is taken out and refitted at another address.",
"statutory_rights_note": "This warranty is given on top of the rights the buyer has in law and takes nothing away from them. Business buyers should read this certificate together with the terms of sale.",
"liability_limit": "What we owe under this warranty is the repair or the replacement described above and no more than the price paid for the unit concerned. Nothing here limits what we owe for death or injury caused by our negligence, or for fraud.",
"governing_law": "the laws of England and Wales",
"authorised_signatory": "Ruth Calloway",
"signatory_role": "Aftersales Director",
"verification_note": "The warranty desk confirms this certificate against the certificate number and any serial number on it. A certificate is issued per project and a unit appears on one certificate only."
}
}
JSON tmpl_your_template_id is
a stand-in: build this template in the visual editor and copy the id it shows, or create one with POST /api/v1/templates. Keys, formats, strict mode and batches are in the API reference.
Or let an AI assistant do it
The DocMake MCP server lets Claude and other assistants make this document the same way. Install it once:
claude mcp add docmake \
--env DOCMAKE_API_KEY=dm_your_api_key \
-- npx -y @docmake/mcp@latestThen ask for the document in plain words:
Make a PDF from my Warranty Certificate template with certificate number "WC-2026-0442" and issue date "October 2, 2026".
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