erhalten
to receive
To get something that is given or sent to you; to receive. Often used in formal language.
Haben Sie meine Bewerbungsunterlagen fristgerecht erhalten?
Did you receive my application documents by the deadline?

to receive / preserve / support
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to receive
To get something that is given or sent to you; to receive. Often used in formal language.
Haben Sie meine Bewerbungsunterlagen fristgerecht erhalten?
Did you receive my application documents by the deadline?

The verb 'erhalten' (to receive/preserve) is inseparable. The prefix 'er-' remains firmly attached to the stem 'halten' in all tenses and sentence types.
Er erhält heute eine wichtige Nachricht.
He receives an important message today.
The meaning depends strongly on the context. When it is about mail, messages, or gifts, 'erhalten' usually means 'empfangen' (to receive). When it is about monuments, traditions, or a condition, it means 'bewahren' (to preserve).
Ich habe gestern eine E-Mail von ihm erhalten.
I received an email from him yesterday.
In the meaning of 'bekommen' (to get), 'erhalten' is more formal and is mainly used in written language, business, or official contexts.
Wir haben Ihre Anfrage erhalten und werden sie bald bearbeiten.
We have received your inquiry and will process it soon.
In the meaning of 'für den eigenen Lebensunterhalt sorgen' (to provide for one's own livelihood), the verb is always used reflexively with 'sich'. The reflexive pronoun must be adapted to the subject.
Er arbeitet auf dem Bauernhof, um sich und seine Familie zu erhalten.
He works on the farm to support himself and his family.
to get / receive
'bekommen' and 'erhalten' can both mean that something arrives with a person or is given to them. 'bekommen' is very natural in everyday language and fits almost all normal situations. 'erhalten' often sounds more formal, for example in letters, emails, contracts, or official information. Learners can easily confuse the words because they often mean the same thing. As a simple guideline: in conversation, people usually say 'bekommen'; in formal texts, 'erhalten' is often a better fit.

Wegen der Arbeit erhält Tom jeden Morgen mehrere E-Mails.
Because of work, Tom receives several emails every morning.
Nach der Arbeit habe ich eine Nachricht von meiner Freundin bekommen.
After work, I got a message from my girlfriend.