# \#tips-and-tricks

**URL:** https://community.thunk.ai/tag/tips-and-tricks/2.md

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## [Limit field to ISO 3166 two-character country code](https://community.thunk.ai/t/limit-field-to-iso-3166-two-character-country-code/122)

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**Author:** [@jrozen](https://community.thunk.ai/u/jrozen)\
**Replies:** 4\
**Last updated:** [May 30, 2025, 4:08pm UTC](https://community.thunk.ai/t/limit-field-to-iso-3166-two-character-country-code/122 "2025-05-30T16:08:37Z")

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Hi! We have a field where we want to store a country, but we want it to be stored in ISO 3166 two-character code format. We experimented with adding this info to the step instructions, but is there a way to constrain t…

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## [Email attachments into a spreadsheet?](https://community.thunk.ai/t/email-attachments-into-a-spreadsheet/116)

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**Author:** [@TyAlevizos](https://community.thunk.ai/u/TyAlevizos)\
**Replies:** 1\
**Last updated:** [April 8, 2025, 4:54pm UTC](https://community.thunk.ai/t/email-attachments-into-a-spreadsheet/116 "2025-04-08T16:54:19Z")

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Here’s a quick how-to on sending emails to a Thunk with the goal of adding those attachments to a spreadsheet cell of your choosing. We started with a very simple Thunk, providing it with the following description durin…