Memento Tools Memento app

Guides

Plain-language help with the paperwork our tools are for. Each guide explains the rules and the reasons, then points you to a free tool that does the fiddly part.

Passport and visa photo sizes by country

Exact passport and visa photo sizes for the US, UK, Schengen, Canada, Australia, India and China: photo size, head size, background, and the digital pixel sizes for online forms.

5 min read

How to tell if a bank statement or payslip has been edited

Practical checks for landlords, employers and lenders: the arithmetic, the fonts, what's hidden in the PDF's properties, and what to do if a document looks edited.

4 min read

How to get a PDF under 100 KB or 200 KB for an online application

Why application portals reject your PDF, what actually makes a PDF big, and step-by-step ways to get under 100 KB, 200 KB or 500 KB while keeping it readable.

4 min read

How to leave your passwords and crypto recovery phrase to your family, safely

A practical plan for making sure your family can reach your accounts and crypto if something happens to you, without writing everything on one piece of paper anyone could find.

4 min read

The six-month passport rule: how long your passport must be valid to travel

Why airlines turn people away with a valid passport, how the six-month, three-month and length-of-stay rules work, and which rule applies where you're going.

3 min read

How to give someone a copy of your ID without risking identity theft

Landlords, banks, employers and agents all ask for a copy of your ID. Here's how to give them one that's useful for its purpose and much harder to misuse.

3 min read

How to make a photo smaller in KB without it looking bad

What decides how many KB a photo takes, why some images refuse to shrink, and how to hit limits like 50 KB, 100 KB or 200 KB while keeping the picture clear.

3 min read

How to check what changed in a contract before you sign it

The final version of a contract isn't always the one you agreed. How changes slip in, where to look, and how to compare two versions word by word in a few minutes.

3 min read

How to work out your age for a job or exam age limit

Age limits are counted on a cut-off date, and the wording matters. How to read the rule, count your age correctly, and avoid a rejected application.

3 min read

How to combine certificates and scans into one PDF, and when to send images instead

Many applications want all your documents in a single PDF, others want one JPG per document. How to do both, keep the order right and stay under the size limit.

2 min read

How to send a passport or ID scan safely by email or WhatsApp

What actually happens to a passport scan when you email or WhatsApp it, how to check the request is real, and simple ways to send it so it's harder to misuse.

3 min read